46. SALMONIDiE — COREGONUS. 
299 - 
tt Gill-rakers numerous, long and slender; preorbital long and narrow; maxillaries 
comparatively long ; the supplemental bone ovate, rather broad. ( Coregon us . ) 
1 Tongue toothless, or nearly so; back elevated. 
400. C. cSBlgseifoa’Biisis (Mitch.) Milner. — Common White-fish. 
Body oblong^ compressed, always more or less elevated, aud becoming 
notably so in the adnlt. Head comparatively small aud short, the snout 
bluntish, obliquely truncated 5 tip of snout on level of lower edge of 
pupil; width of preorbital less thau half that of puijil. Maxillary 
reaching jtast front of orbit, about 4 in head. Eye large, 4-5 in head. 
Gill-rakers moderate, § diameter of eye, about 20 below the angle. 
Color olivaceous above; sides white, but not silvery; lower tins some- 
times dusky. Ilead 5; dei)th3-4. D. 14; A. 44; scales 8-74-9. L. 20 
inches. Great Lakes and northward; the best known and most highly 
valued of the American white-fishes. This species, like others of wide 
distribution, is subject to considerable variations, dependent on food, 
waters, etc. I^eeds on minute organisms. 
(Salmo chtpeiformis Mitchill, Amer. Month. Mag. ii, 321, 1818: Coregonus alhiis Le 
Sueur, Jouru. Acad. Nat. Sci. Phila. i, 231, 1818 : Coregonus alhus Giinthcr, vi, 184, aud 
of authors generally: Coregonus richardsoni Giiuther, vi, 185: Coregonus sapkUssimus 
Giiuther, vi, 186 : Coregonus latior Gunther, vi, 186 : Coregonus otsego, the “ Otsego Lake 
Bass”, DeWitt Clinton Med. & Phil. Register, iii, 188.) 
tt Tongue with about three series of small teeth ; body elongate, compressed. 
491. C. Ba5>a’a«loi*iCMS Rich. — “ Whiting'’ ; Musquaw Paver White fish. 
Body rather elongate, compressed, the back not elevated. Head 
rather long and slender, compress.^d. Mouth rather small, the jaws 
equal, the maxillary reaching to the front of the pupil. Maxillary 
bone broad, rather short, its supidemeutary jiiece ovate. Mandible 
reaching middle of eye. Eye large, 4| in head. Supraorbital bone 
narrow. Gill-rakers rather long. Bluish black above, silvery below; 
scales with dark punctulations ; fins all dusky. Dorsal fin high in 
front, the last rays short. Head 4g ; depth 4;\. D. 11; A. 11; scales 
9-S0-8. L. 12 inches. Great Lake region to the lakes of the Adi- 
rondacks aud kite Mountains, aud northeastward; generally abun- 
dant in cold, clear lakes. 
(Richardson, Fauna Bor.-Amer. iii, 203, 1836; Giinthcr, vi, 176: Coregonus neohan- 
toniensis Prescott, Amer. Jouru. Sci. Arts, xi, 342, 1851.) 
ttt Tongue nearly toothless ; back not elevated. 
492. C. Iioyi (Gill) Jordan. — Lake Moon-eye; Cisco ofi Lake Michigan. 
Body rather elongate, comiiressed, the back somewhat elevated. 
Head rather long, in form intermediate between Coregonus and Arggro- 
