1 76 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — III. 



Catostomus hndsonius Cuvier & Valenciennes, Hist. Nat. des Poissons, xvii, 459, 

 1844. 



Catostomus hudsonius Storer, Synopsis, 419, 1846. 



Catostomus hudsonius Agassiz, Am. Jouru. Sc. Arts, 2d series, xis, 208, 185.5. 



Catostomus hudsonius GUnther, Cat. Fi-sbes Prit. Mus. vii, 13, 18G8. 



Catostomus hudsonius Jordan, Man. Vert. 29.3, 187(). 



Catostomus hudsonius Nelson, Bull. No. 1, Ills. Mus. Nat. Hist. 48, 1876. 

 182".l — Catostomus forsterianus Richardson, Franklin's Journal, 720. 



Catostomus forsterianus Richardson, Fauna Bor.-Amer. iii, Fishes, 116, 1836. 



Catostomus forsterianus DeKa Y, New York Fauna, part iv. Fishes, 203, 1842. 



Catostomus forsterianus Cuvier «fc Valenciennes, Hist. Nat. des Poissons, xvii, 

 463, 1844. 



Catostomus forsteriaiius Storer, Synopsis, 419, i846. 



Acomus forsterianus Girard, Proc. Ac. Nat. Sc. Phila. 172, 1856. 



Catostomus forsterianus Putnam, Bull. Mus. Comp. Zool. 10, 1863. 



Catostomus forsterianus Jordan & Copeland, Check List, 156, 1876. 

 1850 — Catostomus aurora Agassiz, Lake Superior, 3G0, pi. 2, f. 3-4. 



Acomus aurora Girard, Proc. Ac. Nat. Sc. Phila. 173, 1856. 



Catostomus aurora Putnam, Bull. Mus. Conip. Zool. 10, 1863. 

 1856 — Acomus griseus Girard, Proc. Ac. Nat. Sc. Phila. 174. 



Acomus griseus Girard, U. S. Pac. R. R. Expl. x, 222, pi. xlix, 1858. 



Catostomus griseus Gunther, Cat. Fishes Brit. Mus. vii, 14, 1868. 



Catostomus giiseum Cope, Haydcu's Geol. Surv. Wyoming, 1870, 434, 1872. 



Catostomus griseus Jordan & Copeland, Check List, 156, 1876. 

 1856— Catostomus lactarius Girard, Proc. Ac. Nat. Sc. Phila. 174. 



Acomus lactarius Girard, U. S. Pac. R. R. Expl. x, 223, 1858. 



Catostomus lacfarius Jordan & Copeland, Check List, 156, 1876. 



Habitat. — New England to Nebraska and north to Alaska and the Arctic Sea. Ex- 

 tremely abundant in British America and along the northern boundaries of the United 

 States, but not found south of 40° north latitude. 



This is another of our numerous species which have un extremely wide 

 range of distribution and a considerable range of variation. It has been 

 longer known than any other of the Suckers. The oldest specitic name 

 given was that of catostomus, which, however, had to be set aside when 

 the generic name Catostomus was proposed for it. The next name in 

 order of time is the very appropriate one of longirostrum Le Sueur (more 

 properly spelled longirostris), given to some specimens from Vermont. 

 Five pages later, the name hudsonius was given as a substitute for ca- 

 tostomus of Forster. The slight i)riority of longirostrum over hudsonius,, 

 however, seems to entitle it to preference, although the latter name has 

 been most frequently used. Later, specimens considered by Dr. Giiuther 

 to be identical with hudsonius received from Richardson the name "/or- 

 s1erianus^\ and, still later, the name forsterianus was, without evident 

 reason, transferred from this species to teres by Professor Agassiz, who 



