National Museums National Museum

of Canada of Natural Sciences

Ottawa 1975

Publications

in Biological

Oceanography, No. 9

A New Species of Arctic Eelpout,

Lycodes sagittarius,

from the Beaufort Sea, Alaska,

and the Kara Sea, USSR

(Pisces: Zoarcidae)

Don E. McAllister

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AAT ICORNIA if

CALIFUNINIA ay if

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APR 1 2 1976

Publications

d'Océanographie

biologique, n° 9

Musées nationaux Musée national

du Canada des Sciences naturelles

A New Species of Arctic Eelpout,

Lycodes sagittarius,

from the Beaufort Sea, Alaska,

and the Kara Sea, USSR

(Pisces: Zoarcidae)

National Museum of Natural Sciences

Publications in Biological

Oceanography, No. 9

Published by the

National Museums of Canada

Staff editor

Frances Smith

National Museum of Natural Sciences

National Museums of Canada

Ottawa, Canada

Fourth quarter 1975

Information Canada

Catalogue No. NM95-7/9

P0987654321

Y798765

Printed in Canada

ISSN 0068-7995

Musée national des Sciences naturelles

Publications d’'Océanographie

biologique, n° 9

Publié par les

Musées nationaux du Canada

Musée national des Sciences naturelles

Musées nationaux du Canada

Ottawa, Canada

Quatriéme trimestre 1975

Information Canada

N° de catalogue NM95-7/9

T0987654321

A798765

Imprimé au Canada

A New Species of Arctic Eelpout,

Lycodes sagittarius,

from the Beaufort Sea, Alaska,

and the Kara Sea, USSR

(Pisces: Zoarcidae)

Don E. McAllister

Pe31Iome

flaetca OnucaHue HOBOrTO BUA ANVHHOXBOCTON Oenbatoru (Lyco-

des sagittarius), oOvTatowen B BOCTOYHONM Yactu mMopA Bodopta y

6beperoBp ApKtTuyeckouw AnACKYU uv B CeBepHOwW yuactTu Kapckoro

mopa y Sbeperosp CCCP Ha rnyOuHe 357-600 m. OH OTNNYaeTCA OT

APyrux BUAOB NnukOgAOB: 1) NpocTOW OoKOBON nuHuen, 3arHyTON

BHYU3 B NepeaHeN YacTu TeNa U NpOMONKatOWeNCA BAONb OOKOB B

AaHanbHON OOnacTu; 2) KpaTKOW AHTEAHANbHONM ANUHON, COocTaBna-

lowen 38-42% scen anuubli Tena; 3) ANUHHbIMN OploOWHbIMU NNaBHu-

KaMu, NPEBbIWAaKMOWMUMUY NpOAONbHYy!HO OPOuTy rna3sa vu cocTaBNnA-

lOuUMN 3,7-5,5% BCeN ANUHbI Tena. CNUHHOM nnaBHUk COCTOUT U3

98-107 nyyen, a aHanbHbIN — u3 82-92 nyyen (B KakgOmM NOogACcYeTe

BKNtOUaeTCA NONOBUHa NyYYeU XBOCTOBOrO NNaBHuka); 4) roy OHbIMU

nnaBHukamu, HacuuTbiBatwouMnumu 16-17 nyyenw. Bprowuna y 3toro

BUga YeEPHAA, TeNO TEMHOe, 6E3 NATEH WNUu NONOC, OObINHO NOKDPbI-

Batouwwux Teno U aOAOMeH VU AOXOAAWUX MO 3aTbINKa U OCHOBaHNMA

BePTUKaNbHbIX NMNABHUKOB. DJTOT BUA OOUTAeT B BORE C HU3KUMU

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B [OCyMapCcTBEHHOM MYy3ee ECTECTBEHHbIX HAaYK, HAXOMAWIECMCA B

BegeHuu OtTgaena rocygapCTBeHHbIx my3eeB KaHaapl.

NloOasneHb!l Take HEKOTOPbIEe HOBbIe geTanu K ONnuCcaHuto

Lycodes squamiventer Jensen.

Summary

A new species of long-tailed eelpout, Lycodes sagittarius, is

described from the western Beaufort Sea, arctic Alaska, and the

northern Kara Sea, USSR, in depths of 357—600 m. It differs from

other species of Lycodes by the following characteristics: the

single lateral line decurved below the midline anteriorly, and

midlateral in position behind the level of the anal region; the short

preanal length, 38—42% of total length ; the long pelvic fins exceed-

ing the longitudinal orbit diameter and comprising 3.7—5.5% of

the total length; the 98—107 dorsal and 82—92 anal fin rays (each

count including half the caudal fin rays) ; the 16—17 pectoral fin

rays; the black peritoneum; the dark body without light markings;

and the scales covering the body and abdomen, and extending

onto the nape and the bases of the vertical fins. It inhabits tem-

peratures of below O°C and feeds on molluscs and other inverte-

brates: The holotype is deposited in the National Museum of

Natural Sciences, National Museums of Canada, Ottawa.

Some new details are added to the description of Lycodes

squamiventer Jensen.

Résume

L’auteur décrit une nouvelle espéce de lycode a longue queue,

Lycodes sagittarius, signalée dans la zone ouest de la mer de

Beaufort, au large des cétes arctiques de |’Alaska ainsi que dans la

partie septentrionale de la mer de Kara, en U.R.S.S., a des pro-

fondeurs variant entre 357 et 600 metres. Elle se distingue des

autres espéces du genre par une ligne latérale unique, incurvée

vers le bas, située sous la ligne médiane dans la partie antérieure

du corps et occupant une position médio-latérale derriére la région

anale; par la faible longueur de la région préanale (de 38 a 42 p.

100 de la longueur totale) ; par de longues nageoires pelviennes

qui dépassent le diamétre longitudinal de l’orbite et mesurent de

3.7 a 5.5 p. 100 de la longueur totale du corps; par le nombre de

rayons des nageoires dorsale (de 98 a 107) et anale (de 82 a 92),

chacun de ces comptes comprenant la moitié du nombre de rayons

de la nageoire caudale; par des nageoires pectorales soutenues par

16 ou 17 rayons, par un péritoine noir, un corps uniformément

sombre et des écailles qui couvrent tant l‘'abdomen que le reste du

corps de méme que la nuque et la base des nageoires verticales.

L’espéce habite les eaux a température négative et se nourrit de

mollusques et d’autres invertébrés. L’holotype est conservé au

Musée national des Sciences naturelles, Musées nationaux du

Canada, Ottawa.

L’article ajoute quelques détails nouveaux a la description du

Lycodes squamiventer Jensen.

Biographical Note

Don E. McAllister, Curator of Fishes at the National Museum of

Natural Sciences, Ottawa, since 1958, is also a lecturer at the

University of Ottawa. He was born in Victoria, B.C., and received

his Ph.D. from the University of British Columbia in 1964. His

studies have taken him to such places as Newfoundland, Quebec,

the Northwest Territories, British Columbia, and Japan. He has

published over 70 scientific papers, including studies on arctic

fishes, sculpins, smelts, fishes found in archaeological sites, light

organs in fishes, the classification of bony fishes, and a popular

guide, The Freshwater Sport Fishes of Canada. His professional

memberships include the Canadian Society of Wildlife and

Fishery Biologists and the American Society of Ichthyologists and

Herpetologists. His hobbies include photography, skin diving,

cross-country skiing and bonsai.

Acknowledgements

The author is very grateful to Eugene Ruff, who collected the

specimens and made them available for study. Drs. A. P. Andria-

shev, Jorgen Nielsen, N. J. Wilimovsky, and Mr. C. G. Gruchy criti-

cized the manuscript. Drs. A. P. Andriashev and J@rgen Nielsen

lent specimens under their care at the Zoological Institute of the

Academy of Sciences of the USSR, Leningrad (ZIL), and the

Universitetets Zoologiske Museum, Copenhagen (ZMUC), re-

spectively, and Dr. Andriashev also provided X-rays. Alwyne

Wheeler, British Museum (Natural History), London (BMNH#H),

Dr. Stanley W. Weitzman, Smithsonian Institution, Washington,

D.C. (USNM), and Dr. E. J. Crossman, Royal Ontario Museum,

Toronto (ROM), issued catalogue numbers at their institutions for

the paratypes. Jadwiga Aniskowicz made X-rays of the study

material. C. H. Douglas illustrated the holotype. M. F. |. Smith

identified two molluscs from stomach contents. The author wishes

to extend his gratitude to all these persons.

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Figure 1

Holotype of Lycodes sagittarius sp. n., NMC74-

282, 278 mm oa’, from Beaufort Sea, Alaska.

Drawing by C. H. Douglas.

Introduction

Although the shelf ichthyofauna of arctic

North America has been under investigation

for over two centuries, very few collections

have been made in depths over 200 m.

Consequently, it was not surprising that the

study of collections from as deep as 600 m

in the western Beaufort Sea should reveal

several significant range extensions and a

new species of Lycodes. Two specimens of

this new species from the Kara Sea, USSR,

were ascribed by Andriashev (1954) to

Lycodes squamiventer Jensen. But he noted

the essential differences in the lateral line of

his specimens from L. squamiventer and

suggested that his specimens might repre-

sent an independent.species. The collection

of seven new specimens provides a firm

basis for the present description of the new

species.

The Alaskan collections were made by

Eugene Ruff of Oregon State University on

board the Western Beaufort Sea Ecological

Cruise of the USCGC Glacier in August

1972. Collections were trawled in from 30

to 600 m in the western Beaufort Sea on the

North Slope of Alaska between Prudhoe

Bay and Barter Island. An otter trawl with a

3.7 m mouth and a 1.3 cm stretched mesh

nylon liner were used.

Taxonomy

FAMILY ZOARCIDAE

SUBFAMILY LYCODINAE

Genus Lycodes Reinhardt, 1831

Lycodes sagittarius sp. n., Figures 1-3

Lycodes squamiventer (non Jensen), Andriashev,

1954, p. 297, figs. 167, 169 (ex parte: 2 specimens

from northern part of Kara Sea at 595 m); Andria-

shev, 1973, vol.1 : p. 546 (ex parte : Kara Sea speci-

mens).

Holotype

NMC74-282: 278 mm <’;; from arctic coast

of Alaska about 50 miles NNE of Brownlow

Point, at.lat.. 70° 51’ SOM song «17

W: in 357 m; 9 August 1972; field no.

WBS11 CG17; deposited in the collection

of the Ichthyology Section, National Mus-

eum of Natural Sciences, National Museums

of Canada, Ottawa.

Paratypes

NMC74-282A: 197 mm @, and BMNH

1974.10.5.1, 212 mm @; from same haul

as holotype, ZMUC P761071, 233 mm Q9,

NMC74-275, 250 mm 9, and USNM

212282, 253 mm Q ; all from Beaufort Sea,

arctic coast of Alaska, about 43 miles north of

Kaktovik, at lat. 70° 43’ 6” N, long. 143° 42’

48’ W; in 464 m; 5 August 1972; station

no. WBS3 CG4. ROM 30520, 164 mm oa’;

from Beaufort Sea, arctic Alaska, about 52

miles N of Return Islands, at lat. 71° 13’ 12”

N, long. 148° 34’ 24” W; in 600 m; 18

August 1972; station no. WEB $20. ZIL

32050, two o specimens; 179 and198 mm;

east of Graham Bell Island, Franz Joseph

Land, in northern part of St. Ann Trough at

lat..$0° 41’ N, long... 1235 V5 im Ooo) mn;

5 October 1948; Litke station no. 194;

collected by V. Vagin.

Diagnosis

Distinguished from other species of Lycodes

by the following characteristics: the single

lateral line decurved anteriorly and mid-

lateral posteriorly; the short preanal length

38-42% of total length; the long pelvic fins,

3.7-5.5% of total length, that exceed the

longitudinal orbit diameter; the numerous

dorsal fin rays 98-107 and anal fin rays

82-92 : the moderate number of pectoral fin

rays 16-17; the black peritoneum; and the

dark body without light markings.

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Taxonomy

Meristics

D+1/2C 98-107; C 4-6+4-6; A+1/2C

82—92: vertebrae 1 9—21 + 84-88 = 104-109;

P 16-17; gill rakers 2-3-+10-13=12-15.

Description

Lateral line on body consisting of pale

neuromasts that descend from above gill

cover towards the anal origin at an angle of

about 30° from horizontal, then rise vertic-

ally to midline usually at a level between

the anus and the anal fin origin and con-

tinue posteriorly down the middle of the

side. But in one case the lateral line rises

vertically to the midline one orbit diameter

in front of the anus, and in another case an

orbit diameter behind the anal origin. A

short dorsolateral row of neuromasts may be

found on either side of the nape.

Head moderate, its length including oper-

cular membrane comprising 20-22% of

total length, its maximum width equalling or

exceeding its depth. Longitudinal orbit dia-

meter comprising 14-19% of head length

and 3—-5% of total length. Snout length

comprising 32-36% of head length and

7—8% of total length. Mental crests of mod-

erate height, with anterior ends bevelled and

not projecting or fusing together. Gill cover

tip slightly pointed, upper edge horizontal.

Gill opening wide, descending below pec-

toral fin to within 1-3 mm of base of pelvic

fin. Posterior end of upper jaw ending behind

pupil (holotype) or under front third of

orbit. Teeth conical, 14—27 on premaxillary,

3-13 on vomer, 7—23 on palatine, 19—42 on

mandible (10, 7, 15, and 42 respectively in

holotype), number tending to increase with

size. Infralabial lobe narrow, not sharply

demarcated anteriorly from lip.

Body elongate. Scales cover body in-

cluding abdomen, extending anteriorly on

nape at least to level of operculum, past the

bases of the pectoral fins and the tips of the

appressed pelvic fins almost to their bases.

Twenty to 27 horizontal rows of scales on

the body above the origin of the anal fin.

Scales extend onto the vertical fins (even

in the specimen with a total length of

164 mm), covering one-quarter to two-

thirds of their height. Two digitiform pyloric

caeca lie behind the stomach. Orange eggs

up to 4.5 mm in diameter were found in a

specimen collected 5 August 1948.

Dorsal and anal fins long, continuous

with caudal fin. Predorsal length 25-29%

of total length. Posterior edge of pectoral fin

diagonal, without emargination, lower rays

exserted, length short, comprising 9—12% of

total length. Pelvic fins long, length ex-

ceeding longitudinal orbit diameter and

comprising 3.7—5.5% of total length.

Colour of body and fins a dark brown

monotone, scales paler, abdomen and side

of head below and behind eyes are darker,

but the specimen with a total length of

164 mm has a yellowish body, dark gill

cover and abdomen. Buccal and branchial

cavities dusky, peritoneum black.

Biology

Specimens were caught at depths of 357,

455, and 600 m in arctic Alaska, probably at

negative temperatures. Judging from sedi-

ment in the gut, the bottom was a grey mud.

The two caught in the Kara Sea, USSR,

were caught at 595 m depth-on a brown

mud bottom, where the near-bottom tem-

perature was —0.91°C, the salinity 34.96%o,

and the oxygen saturation 88%. Eggs in the

Alaskan specimens were well developed in

early August, but testes in the Kara Sea

specimens were poorly developed in early

October (Andriashev 1954), suggesting

late-summer or early-fall spawning. Stom-

achs of Alaskan specimens contained anne-

lids, bivalves and gastropods (Yo/diella

intermedia Sars and Cyclichna cf. occulta

Mighels and Adams), and crustaceans. The

high number of vomerine teeth (more

round-tipped in larger specimens) in this

species may be an adaptation to a duro-

phagus molluscan diet. The holotype and

topotypic paratypes were taken with Ra/a

sp., Reinhardtius hippoglossoides, Lycodes

seminudus, L. squamiventer, and a liparid.

The other Beaufort Sea paratypes were

taken with Cottunculus microps(?),Lycodes

eudipleurostictus, and L. seminudus. Boreo-

gadus saida were also taken in both collec-

tions, but were probably taken in midwater

during descent or ascent of the otter trawl.

The Kara Sea paratypes were collected with

a male /riglops nybelini and a male /ce/lus

bicornis.

Etymology

The specific name, sag/ttarius, is taken from

the Latin sagittarius, an archer, in reference

to the bow it carries in the anterior portion

of the lateral line. The specific name is

treated as a masculine noun in the nomi-

native singular standing in apposition to the

generic name.

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Comparison with Other Species

The genus Lycodes may be divided into

long- and short-tailed members. Long-

tailed Lycodes have the anterior portion of

the lateral line ventrally directed, a longer

urosome, more dorsal and anal fin rays, more

vertebrae, tend to be more completely scaled,

more often have black instead of light peri-

toneum, and tend to inhabit deeper and

cooler waters. With the possible exception of

one or two species, the long-tailed Lycodes

seem to form a natural group. Their ventrally

directed lateral line is probably an advanced

condition compared to the wholly mid-

lateral state. The black peritoneum of this

group may be an adaptation to eating bio-

luminescent prey (McAllister 1961); the

long tail may be related to the selective

value of bearing an increased number of

neuromasts in deeper-bottom waters (Mar-

shall 1971: 146). The long pelvic fins in

Lycodes sagittarius may have achemosensory

function, assisting the eelpout in locating

food in the light-poor arctic deepwater en-

vironment, as suggested by McAllister (in

press) for other taxa of arctic fish.

Lycodes sagittarius is a long-tailed spe-

cies. It differs from all except seven species

in the genus by possessing a single lateral

line anteriorly decurved, posteriorly mid-

lateral. These seven species, which are

restricted to the western North Pacific

(except for L. palearis, also found in the

eastern North Pacific) and to the neigh-

bouring Bering and Chukchi seas, may be

individually distinguished from the new

species as follows. Lycodes palearis has

shorter pelvic fins that comprise 1.1—3.1%

as compared to 3.7—5.5% of total length, pale

instead of black peritoneum, anterior ends of

mental ridges projecting instead of bevelled.

Lycodes brevipes ochotensis has pelvics

shorter instead of longer than the orbit dia-

meter, dorsal rays 87 as opposed to 98-107,

anal rays 76 as opposed to 82—91, pectoral

rays 20 as opposed to 16-17, and perito-

neum dark grey instead of black.* Lycodes

soldatovi has mental crests projecting an-

teriorly; pectoral rays 22-23 instead of

16—17; and pelvic fins about half, instead of

more than, the orbit diameter. Lycodes

ygreknotatus has pelvic fins only half, as

opposed to exceeding, the orbit diameter;

dorsal rays 88 as opposed to 98-107; anal

rays 77 as opposed to 82-92; pectoral rays

21 as opposed to 16—17; and five Y-shaped

white markings as opposed to none. Lycodes

microlepidotus has pelvic fins shorter than

*“Lycodes brevipes brevipes has pelvic fins less

than one-half, instead of exceeding, the orbit

diameter; a single ventral lateral line; pectoral rays

19-21 instead of 16—17; and pale instead of black

peritoneum. L. 6. diapteroides has a single lateral

line descending toward the anus but disappearing

under the pectoral fin without a midlateral section,

pectoral fins with 19—20 rays instead of 16—17, and

pelvic fins less than one half the orbit. Lycodes

brevipes ochotensis may well represent a species

distinct from the other two subspecies on the basis

of the lateral line, low dorsal and anal fin ray

counts, and no light bands crossing the dorsal fin.

Table 2

Meristic data for Lycodes sagittarius sp. n.

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USNM 212282 2 TGS 8 91

NMC74-275 1 98 8 83

ZMUC P761071 Ss 107 8 84

BMNH 1974 .10.5.1 Zz 04 8 84

NMC74-282A 4 102 8 90

ROM 30520 1 107 1.2 a2

ZIL 32050 1 101 9 a4

ZIL 32050 2 og S) 87

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Comparison with Other Species

pupil instead of longer than the orbit, dorsal

rays 82 instead of 98-107, anal rays 74—75

instead of 82—92, pectoral rays 20-21 as

opposed to 16—17, pale as opposed to black

peritoneum, and a light colour with dark

marks as opposed to evenly dark coloura-

tion. Lycodes jenseni has dorsal rays 88—90

as opposed to 98-107, anal rays 78-80 as

opposed to 82-92, pectoral rays 18-20 as

opposed to 16-17, pelvic length 2.2% in-

stead of 3.7—5.5% of total length, and pale

instead of black peritoneum. Lycodes ma-

crochir has a deeply notched instead of

entire pectoral fin; pelvics one-third, instead

of exceeding, the orbit diameter; pectoral

fins 15-19% instead of 9-12% of total

length; dorsal fin rays 82—88 instead of

98-107; anal rays 67—72 instead of 82-92;

pectoral rays 19-20 instead of 16-17; and

pale instead of black peritoneum. Data for

these species were obtained from Andria-

shev (1937, 1954, 1955, 1959), - Bayliff

(1954), Fedorov (1966), Hart (1973),

Jensen (1904), Matsubara (1963), Schmidt

(1950), Taranetz (1937), Taranetz and

Andriashev (1935), and Vladykov and

Tremblay (1936).

Lycodes squamiventer Jensen resembles

Lycodes sagittarius in many respects. | was

able to examine three syntypes of L. squami-

venter and their X-rays plus an X-ray of a

fourth syntype thanks to J@rgen Nielsen

and A.P. Andriashev. Syntype ZMUC 236

is now deposited in the National Museum of

Natural Sciences as NMC74-395.

Lycodes squamiventer Jensen differs

trenchantly from Lycodes sagittarius in

having two lateral lines — one a ventral

lateral line that descends to and is parallel

with the anal fin base, the other a mid-

lateral line on the urosome. In addition, the

pelvic fins are shorter, 2.6—3.0% instead

of 3.7—5.5% of the total length, and the

pectoral rays number 17—20 instead of

16-17. Since L. squamiventer is sympatric

with L. sagittarius, a specimen of squami-

venter having been found in the same

collection as the holotype of sagittarius,

the two can be considered as valid biological

species. Examination of the syntypes of L.

Sgquamiventer permits one to add the

following details to the original description:

peritoneum dark brown to black; vomerine

teeth 3—4 ; front tip of mental crests vertical

or slightly projecting; pelvics shorter than

orbit diameter and comprising 2.6—3.0% of

total length; pectorals comprising 11-13%

14

of total length; gill rakers 3-++-11-12 =14—

15, vertebrae 97-101 (104 in Alaskan

specimen); dorsal rays 94-98 (99 in

Alaskan) ; anal rays 81—86 (87 in Alaskan) ;

and pectoral rays 20 (17 in Alaskan).

Key to the Species Groups of the Genus Lycodes

The following key distinguishes the major species groups within

the genus and should assist in identification of any future speci-

mens of Lycodes sagittarius.

1(2)

Lateral line midlateral, single, not descending below mid-

lateral plane. Preanal distance (42, 43, 44) 45-52

(53, 55)% of total length. Dorsal rays 72-79, anal rays

64—81 (90). Scales usually lacking on nape, abdomen and

vertical fins, sometimes entirely naked...... Short-tailed

Lycodes, including: heinemanni Soldatov, jugoricus Kni-

powitch, /ava/aei Viadykov & Tremblay, /uetken/ Collett,

macrolepis Taranetz & Andriashev, mucosus Richardson

(=knipowitschi Popov), polaris Sabine (=agnostus Jen-

sen), raridens Taranetz & Andriashev, reticu/atus Rein-

_ hardt, rossi Malmgren, schmidti Soldatov, semenovi Popov,

2(1)

3(4)

seminudus Reinhardt, terao/ Katayama, turneri Bean,

uschakovi Popov.

Lateral line descending below midline from the upper

corner of the gill cover towards the anal origin, single or

double. Preanal distance (33) 35-43 (44, 45, 46)% of

total length. Dorsal rays 85-124, anal rays (67—74)*

75-107. Often with scales on nape, abdomen and vertical

fins; never entirely naked...... Long-tailed Lycodes.

Lateral line double with one descending from the gill cover

towards the anal base and continuing for greater or lesser

distances just above the base of the anal fin, and a second

one on the midlateral surface of the urosome, which some-

times extends forward, reaching or falling short of the

‘upper corner of the gillcover...... for example, agu/hensis

Andriashev, atratus Vladykov & Tremblay, bathyb/us

Schmidt, ** esmarki/ Collett, eudip/eurostictus Jensen, palli-

dus Collett, sguamiventer Jensen.

Lateral line single.

Without midlateral lateral line on tail, a single lateral line ex-

tending down towards anal origin or past origin along the

anal fin base...... for example, a/bolineatus Andriashev,

andriashevi Fedorov, atlanticus Jensen, brevipes brevipes

Schmidt, brevipes diapteroides Taranetz & Andriashev,

brunneofasciatus Suvorov, concolor Gill & Townsend,

diapterus Gilbert, frigidus Collett, terraenovae Collett, vah/ii

Reinhardt.

Lateral line midlateral on tail and decurved anteriorly.

Peritoneum pale...... jJenseni Taranetz & Andriashev,

macrochir Schmidt, microlepidotus Schmidt, pa/earis

Gilbert, so/datov/ Taranetz & Andriashev.

Peritoneum dark brown, grey or black.

Length of pelvic fin less than orbit diameter and less than

2% of total length. Pectoral rays 19-21. Dorsal fin with

light bars or Y-shaped markings...... brevipes ochotensis

Schmidt, ygreknotatus Schmidt.

Length of pelvic fin exceeds horizontal orbit diameter, and

forms 3.7—5.5% of total length. Pectoral fin rays 16-17.

Dorsal fin dark without light markings...... Lycodes

Sagittarius sp. n.

* Anal rays less than 75 only in L. pa/earis fasciatus and L. macrochir (67-74).

** The lateral line in the 64 mm type of L. bathybius is not yet complete (/n Jit.

A.P. Andriashev).

15

References Cited

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(1937, 1955). A contribution to the knowledge of

the fishes from the Bering and Chukchi seas [in

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(1954, 1964). Fishes of the northern seas of the

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Zoologicheskii Institut, Opredeliteli Po Faune SSSR

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(1955). New and rare species of fishes of the

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(1959). On the systematic position of the South

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Bayliff, W. H.

(1954). A review of the Zoarcidae of the north-

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(1966). A new species of Lycodes andriashevi

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Hart, J. L.

(1973). Pacific fishes of Canada. Fish. Res. Board

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Jensen, A. S.

(1904). The North-European and Greenland Lyco-

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16

McAllister, Don E.

(1961). A collection of oceanic fishes from off

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(In press). The ecology of marine fishes of Arctic

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(1950, 1965). Fishes of the Sea of Okhotsk [in

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Taranetz, A. J.

(1937). Handbook for identification of fishes of

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espéces du méme genre de |’Atlantique occidental.

Fauna et Flora Laurentianae 1 : 1—45, 17 figs.

Manuscript submitted for publication 15 November

1974.