466 Bulletin 47, United States National Museum. 



highly valued of the American whitefishes. It feeds on minute organ- 

 isms. This species, like others of wide distribution, is subject to con- 

 siderable variations, dependent on food, waters, etc. One of these is the 

 so-called Otsego Bass, var. otsego (Clinton), a form landlocked in Otsego 

 Lake at the head of the Susquehanna River. (Clupea, a shad or herring; 

 forma, shape.) 



Salmo clupeiformis, MITCHILL, Ainer. Month. Mag., u, 1818, 321, Sault Ste. Marie. 



Coregonus albus, LE SUEUR, Journ. Ac. Nat. Sci. Phila., i, 1818, 231, Lake Erie to Arctic Sea; 



GUNTHER, Cat., vi, 184, 18GG, and of many authors. 

 Coregonus otsego, the "Otsego Lake Bass," DEWirr CLINTON, Mod. & Phil. Register, in, 188, 



about 1814; Otsego Lake ; a landlocked form. 



Coregonus sapidissimuz, AGASSIZ, Lake Superior, 344, 1850, Lake Superior. 

 Coregonus latior, AGASSIZ, Lake Superior, 348, 1850, Lake Superior. 

 Coregonus clupeiformis, JORDAN & GILBERT, Synopsis, 299, 1883. 



761. COREGONUS NELSONII, Bean. 



(HUMPBACK WHITEFISH.) 



Head 5; depth 4. D. 12; A. 12; scales 10-88-8. Allied to Coregonus 

 clupeiformis, but distinguished by its arched and compressed back ; snout 

 not very blunt. Maxillary 4 in head, reaching front of eye. Gill rakers 

 moderate, a little more than half eye, about 26 in number; ventrals a 

 little nearer snout than base of caudal. Coloration plain. Alaska, from 

 Bristol Bay northward, common ; a bony species of inferior flavor. ( Bean. ) 

 (Named for Edward W. Nelson, its discoverer, the well-known ornitholo- 

 gist, who collected largely in Alaska.) 



Coregonus nelsonii, BEAN, Proc. U. S. Nat. Mus., 1884, 48, Nulato, Alaska. (Type, No. 29903. 

 Coll. Nelson.) 



762. COREGONUS LABRADORICUS, Richardson. 



(SAULT WHITEFISH ; MUSQUAW RIVEE WHITEFISH ; WHITING OF LAKE WINNIPISEOGEE.) 

 Head 5; depth 3^ to 4; eye large, 4i to 5; snout 41 to 5. D. 11 or 12; A. 

 11 or 12; scales 10-71 to 76-9. Gill rakers short, about 2 to 21 in eye, 

 10 -f- 15 or 16. Body rather elongate, compressed, the back not elevated. 

 Head rather small and slender, compressed. Distance from tip of snout 

 to occiput about 2| in distance from occiput to origin of dorsal fin. 

 Mouth rather small, the lower jaw short, the snout projecting; the 

 maxillary reaching front of pupil ; maxillary bone broad, rather short, 

 its supplementary piece ovate. Mandible reaching middle of eye. Tongue 

 with about three series of small teeth. Supraorbital bone narrow. Dorsal 

 fin high in front, the last rays short. Bluish-black above; silvery below; 

 scales with dark punctulations on the edges; fins all dusky, pectorals 

 and ventrals pale at base. Length 21 inches. Winnipeg and Great Lakes 

 region to the lakes of the Adirondacks and White Mountains, and north- 

 eastward ; generally abundant in cold, clear lakes and large streams; 

 abundant at the Sault Ste. Marie ; a species of good flavor, valued as food. 

 A variable species, perhaps containing several recognizable subspecies. 



Coregonus labradoricm, RICHARDSON, Fauna Bor.-Amer., in, 206, 1836, Musquaw River, Lab- 

 rador ; GUNTHER, Cat., vi, 176, 1866 ; JORDAN & GILBERT. Synopsis, 299, 1883. 



?J Coregonus angusticeps, CUVIER & VALENCIENNES, Hist. Nat. Poiss., xxi, 534, 1848, Saskatch- 

 ewan River ; description brief and erroneous. 



Coregonus neohantoniensis, PRESCOTT, Amer. Journ. Sci. Arts, xi, 1851, 343, Lake Winnipiseogee, 

 New Hampshire. 



