SALMONOID FISHES OF THE GREAT LAKES. 
39 
be questioned whether this Yukon fish is not a distinct species of Prosopium separate from the ordinary 
Coregonus quadrilateralis . Our specimens are from Mackinac, Cheboygan, Marquette, and Blind River. 
Description of a specimen of Coregonus quadrilateralis 15.5 inches long from Blind River, North 
Channel, Lake Huron: 
Head 5.5 in body length to base of caudal; depth 4.5; eye 5 in head; snout 3.6; interorbita 
breadth 3; maxillary from tip of snout somewhat longer than eye diameter; caudal peduncle length 
1.28 in head, its depth one-half its length; dorsal 11 (fully developed rays); anal 12; scales 8-90-7, 
between occiput and origin of dorsal 35; branchiostegals 8; gillrakers 6+10. 
Body elongate, little compressed, more terete than in any other species of the genus, its greatest 
depth and width in anterior portion of body, hence space from snout to insertion of dorsal more 
strongly arched than remainder; caudal peduncle long, little compressed, half as deep as long; head 
small, pointed; snout moderately short; post-orbital and sub-orbital bones broad; maxillary very short, 
broad, not reaching eye; supplementary bone very narrow; mandible short, three in head, not 
reaching posterior edge of pupil, included within upper jaw; dorsal contour arched somewhat, 
although not greatly; distance*from snout to occiput 2.5 in distance from occiput to dorsal insertion. 
Dorsal insertion nearer snout than base of caudal, its longest ray equal to distance from snout to 
occiput, its base about 1.5 in head; adipose small; caudal short; pectorals short, somewhat longer 
than dorsal rays, inserted low, reaching halfway to ventrals; ventrals very short, considerably more 
so than pectorals; anal base somewhat more than 0.5 head, its longest ray 1.66 in head. Lateral line 
straight, scales rather small. 
Color in spirits, rather dark on sides and back, colorless ventrally; a line or streak of dark along 
edges of longitudinal rows of scales, especially just below lateral line; fins pale, except for borders 
of dorsal and caudal, which are dark 
Coregonus kennicotti Milner. Kennicott’s IVhitefish. 
Coregonus kennicotti Milner, in Jordan & Gilbert, Synopsis Fishes North Amer., p. 298, 1883, Fort Good Hope, 
British America. 
Habitat: Mackenzie River, Canada, Yukon River, and other streams of the Alaskan region 
Recorded by Evermann from Lake Bennett, Alaska, v/here it is probably common. 
Coregonus stanleyi Kendall. Stanley’s IVhitefish. 
Coregonus stanleyi Kendall, Bull. U. S. Fish Comm., vol. xxii, 1902 (1904), p. 366, with figure, thoroughfare 
between Mud and Cross lakes, Aroostook County, Me. 
Habitat: Lakes of northern Maine. 
This species, provided with pearly bodies on the scales in the breeding season, seems nearest to 
the Rocky Mountain whitefish, Coregonus williamsoni. 
