878 FISHES—SALMONIDZ. 
tt Preorbital long and narrow; gill-rakers long and slender; supraorbital oblong 
.maxillary comparatively long, the supplemental bone ovate, raiher broad. 
( Coregonus.) 
t Tongue toothless, or nearly 80; back elevated. 5 : CLUPEIFORMIS. 
{ Tongue with about three series of small teeth; body elongate, compressed, the 
back not elevated. : : : : : . : : LABRADOEICUS. 
** Promaxillaries narrow, placed mere or less horizontally ; mandible elongate, often 
projecting ; the outline of the muzzle pointed; all the bones of the head more or 
less elongate. 
§ Body elongate, subfasiform, the dorsal and ventral curves not equal; seales 
small, uniform, convex behind; gill-rakers long and slender. (Argyrosomus, 
Agassiz.) 
a. Lower jaw shorter, included; premaxillaries oblique, their anterior mar- 
gin in front below level of pupil; scales bright silvery, not punctate. 
HOYL. 
aa. Lower jaw more or less prejecting; premaxillaries nearly horizontal, 
their anterior margins in front, net below, the pupil; scales punctu- 
late with black. : : : ARTEDI, NIGRIPINNIS. 
§§ Body short, deep, compressed, shad- like curve of the back similar to that 
of the belly; scales large, larger fords rather closely imbricated, 
the posterior margin little convex. (Allosomus, Jerdan.) TULLIBEE. 
92. CoOREGONUS QUADRILATERALIS Richardégon. 
Pilot-fish; Shad Waiter; Round Fish; Mememonee White-fish. 
Salmo (Coregonus) quadrilateralis, RicHARDSON, Franklin’s Journal, 1823, 714, 
Coregonus quadrilateralis, GUNTHER, Cat. Fish. Brit. Mus., vi, 176.—JORDAN, Man. Vert, 
2d Hd., 1878, 276, and of authors generally. 
Coregonus noveangle, PRescorT, Amer. Journ. Sci, Arts, xi, 1851, 342. 
Body elongate, not elevated, nor much compressed, the back rather broad, the form 
rather more terete than in any of the other species; mouth very small and narrow, in- 
ferier, the broad maxillary not reaching to opposite the eye, 54 in head; head long, the | 
snout compressed and bluntly peiated, but not strongly decurved ; mandible originating , 
under middle of eye, 34 in head; adipose fin small; gill-raker short and stoutish ; 
snout scarcely below level ef lower edgs of eye; preorbital wider than pupil; head 5 
in length; depth 42; D.11; A. 10; scales 9-80 to 90-8; color dark bluish above, silvery 
below. Length about 1 foot, 
Habitat, deep, cold Jakes, New Hampshire, Upper Great Lake Region, and northward 
to Alaska. I have seen no specimens from Lake Erie, but it undeubtedly occurs there. 
Diagnosts.—From the other species of White-fish found in the Great 
Lakes, this species may be known by its short, blunt gill-rakers and 
broad préorbital. | 
Habits.—Little distinctive is recorded of the habits of the Menomonee 
Whitefish. It is never taken in large numbers; it inhabits considera- 
ble depths, and the stomach is often found to be filled with emali shells. 
