Jordan and FA'ertnann. — Fishes of North America. 465 



Coregnnus l-ennicol! i, Milner, in Jordan & Gilbert, Synopsis, 298, 1S8:!, Fort Good Hope, 

 British America. (Type, No. 8971. Coll. Kennicott); Gilhert, Hull. U. S. Fish Comm., 

 XIV, 1894, 23. 



758, COUEGOM S KICHARDSOXII, Giintlior. 



B. 9 ; D. 13 ; A. 13 ; scales 10-72 to 80-12. Very similar in form to C. dupei- 

 formis. Snout of moderate length, obliquely truncated, with the upper 

 jaw projecting beyond the lower; eye shorter than the snout ; maxillary 

 extending to anterior edge of the eye, its length 4 in head. Supple- 

 mentary bone of the maxillary short, broad, semicircular. Length of 

 mandible a little less than least depth of tail. Pectoral longer than 

 head, without snout. Arctic North America. (Giinther.) A doubtful 

 species, perhaps identical with CoregonuH kennicotti, or possibly with 

 Coregonus nelsonii. (Named for John Richardson, the accomplished author 

 of the Fauna Boreali-Americana. ) 



Corejoniis richanJrionii, Guntuer, Cat., vi, 185, 1860, exact locality unknown 



759. COREGONUS QUADRILATEBAIIS, Ri. li.aidson. 

 (Pilot-fish ; Menominee Wiiitefish ; Shad-Waiter ; Round Whitekisii.) 



Head 5; depth 4i; eye 5^. D. 11; A. 10; scales 9-80 to 90-8. Body 

 elongate, not elevated nor much compressed, the back rather broad, the 

 form more terete than in any of the other species. Mouth very small 

 and narrow, inferior, the broad maxillary not reaching to opposite the 

 eyCi 5^ in head. Head long, the snout compressed and bluntly pointed, 

 its tip not beloAV level of eye ; protile not strongly decurved. Preorbital 

 wider than pupil. Mandible originating under middle of eye, 'Siin head. 

 Adipose fin small. Gill rakers short and stoutish, about 7 -(- 10 in number, 

 4 to 5 in eye, but rather longer than in C. williamsoni. Color dark bluish 

 above, silvery below. Length a foot or more. Lakes of New England 

 and the Great Lakes, northwestward to Alaska, as far south as Yukon 

 River; abundant in cold, deep waters. (quadrilateraUs, {onv-sided.) 



Coriyoiins qiiailrilateraUf, Richardson, Franklin's Journ., 1823, 714, Fort Enterprise, British 

 America; Gunthek, Cat., 176, 1866; Jordan & Gilbert, Synopsis, 298, 1883. 



Coreijoiius noi^r-augelue, Prescott, Anitjr. Jouni. Sci. Arts, xi, 1851, 342, Lake 'Winnipiseogee, 

 New Hampshire; Gi'NTHEU, Cat., 18(1, 1866. 



Subgenus COREGONUS. 



760. COREGONUS CLUPEIFORMIS (Mitchill). 



(Common Wiiitefish.) 



Head 5 ; depth 3 to 4 ; eye large, 4 to 5. D. 11 ; A. 11 ; scales 8-74-9. 

 VertebrsB 59. Body oblong, compressed, always more or less elevated, 

 and becoming notably so in the adult. Head comparatively small and 

 short, the snout bluntish, obliquely truncated; tip of snout on level of 

 lower edge of pupil; width of preorbital less than half that of pupil. 

 Maxillary reaching past front of orbit, about 4 in head. Gill rakers mod- 

 erate, i diameter of eye, usually about 10 -f 17 to 19. Color olivaceous 

 above; sides white, but not silvery ; lower tins sometimes dusky. Length 

 2 feet or more. Great Lakes and neighboring waters, rarely ascending 

 streams; not in Alaska nor Arctic America; the best known and most 

 F.N. A. 31 



