SALMONIOD FISHES OF THE GREAT LAKES. 
15 
Leucichthys lucidus (Richardson). Great Bear Lake Herrinq. 
Salmo ( Coregonus ) lucidus Richardson, Fauna Bor.-Amer., vol. in, p. 207, pi. xc, fig. 1, 1836, with figure. Great 
Bear Lake. 
Coregonus lucidus, Gunther, Cat., vol. vi, p. 198, 1866, Great Bear Lake. Gilbert, Bull. U. S. Fish. Comm., vol. 
xiv, 1894, p. 24, Great Bear Lake. 
Argyrosomus lucidus, Jordan & Evermann, Fishes North and Mid. Amer., pt. 1, p. 471, 1898; after Gilbert. Scofield 
Report Fur-Seal Invest., pt. hi, p. 495, 1898, Arctic Sea off Herschel Island. 
Habitat: Mackenzie River Basin. 
The herring of Great Bear Lake is known from Richardson’s description and excellent figure, and 
from specimens taken in 1893 by the artist, Miss Elizabeth Taylor. From these specimens now before 
us the following description has been prepared. Two specimens were also obtained by Scofield & Seale 
in the Arctic Sea off Herschel Island. The species has a very long, compressed body and a large adipose 
fin. It is nearest in its relationship to L ontariensis, but the differences are obvious. In Richardson’s 
figure the adipose fin is represented as far too small and too far back, but it is to be remembered that 
this figure is taken from a dried skin. 
Head small, 5 to 5.33- depth 4.33 to 4.6; eye 5 ; dorsal 1 1 or 12 developed rays; anal 1 1 or 12; scales 
85 to 87, 1 1 or 12 in an oblique series downward and forward from front of dorsal to lateral line. Eye 
slightly less than length of snout, 1.5 times in interorbital width. Body slender, elongate, the curve 
of back and belly about equal, the greatest depth exceeding length of head; snout narrow, almost 
vertically truncate when mouth is closed, the lower jaw fitting within the upper, but the mouth not 
inferior; distance from snout to nape 2.60 to 3 in distance between nape and front of dorsal; head much 
smaller in one of our specimens than in the other, mouth oblique, with rather slender maxillary, which 
extends to vertical midway between front and middle of pupil, its length from tip to articulation equaling 
distance from end of snout to front of pupil, and contained 3.66 to 3.8 in length of head; supplemental 
maxillary bone probably broader than in L. artedi, from .6 to .66 greatest width of maxillary; suborbitals 
very narrow, their least width less than half diameter of pupil; supraorbital bone large, its width 2.5 
to 2 66 in its length. Gillrakers very long and slender, the longest slightly more than .66 length of 
eye, 16+28 in number in each specimen. Front of dorsal slightly nearer tip of snout than base of 
upper rudimentary dorsal rays (the fins are mutilated, so that their length can not be given); adipose 
fin large, inserted vertically above last anal rays, its height from tip to posterior end of base equaling 
vertical diameter of eye. Color silvery. As pointed out by Doctor Gunther, this northern form differs 
from L. artedi in its shorter head and smaller eye. It seems also to have the premaxillaries placed 
at a greater angle than in L. artedi. 
Leucichthys laurettse (Bean) Lauretta Whitefish. 
Coregonus laurettas Bean, Proc. U. S. Nat. Mus., vol. iv, 1881, p. 156, Point Barrow, Alaska; type no. 27695; coll. 
Capt. Calvin L. Hooper. 
Argyrosomus laurettce, Jordan & Evermann, Fishes North and Mid. Amer., pt. hi, p. 471, 1898. Evermann & Smith, 
Rept. U. S Fish Comm. 1894. p. 374, pi. 25 (1896) Point Barrow. Evermann & Goldsborough, Bull. Bureau 
Fisheries, vol. xxvi, 1906 (1907), p. 235, Point Barrow, Port Clarence, Yukon River at Nulato, Meade River, 
Kuaru River, Elson Bay, Nushagak River, Naknek River. 
Habitat: Lakes and streams of northern and western Alaska. 
This species is apparently common in northern Alaska. It seems to be an ally of L lucidus, having 
the adipose fin large, the caudal peduncle slender, and the pectoral not reaching halfway to ventrals. 
The fins are perhaps larger than in L. lucidus, the head smaller and the body deeper. 
The following is the substance of Doctor Bean’s account of this species: 
Head 5; depth 4; eye 4.5 to 5; dorsal 12; anal 11; ventral 12; scales 10-84 to 95-10, 84 to 87 in 
specimens examined. Body robust, the back elevated; head small and slender, the small eye not 
longer than snout; distance from nape to front of snout 2.5 times in its distance from dorsal; maxillary 
about reaching middle of eye, 3.5 in head, its supplemental bone half its length; lower jaw very slightly 
longer than upper; mandible 2.33 in head; lingual teeth present; gillrakers long and numerous, 10+25; 
ventral scale not half length of fin; pectoral short, not reaching halfw'ay to ventrals. Scales smaller 
than in L. artedi, 16 cross series under base of dorsal. Alaska, from Yukon River northward to Point 
Barrow, generally common. Apparently very close to L. lucidus, but the base of dorsal longer. 
