322 FISHES. 



5. C. bison, Ag. Buffalo Carp SuckePw Muzzle, 

 very long, conic; eye median, large, 4^ in head; body 

 elongate; depth 3 in length; dorsal fin elongate, nearly 

 as much so as in C. velifer; D. 28; lat. 1. 40. Missis- 

 sippi Valley. 



6. C. cyprinus, (LeS.) Ag. Silvery Carp Sucker. 

 Muzzle prominent, but rather obtuse; eye small, anterior, 

 5 in head; depth 2f in length; longest dorsal rays about 

 f the length of the base of the fin; D. 28, or 29; lat. 1. 



40. N. Y. to Ala., East of the Alleghenies. 

 hh. Head smaller, 4i to 5 in length. 



7. C. thompsoni, Ag. Lake Carp Sucker. Short 

 and stout; dorsal region much arched; scales narrowly 

 exposed; longest dorsal ray reaching the 22d; eye small, 

 S^in head; head 4^ in length; depth ^\ D. 28; lat. 1. 



41. Great Lakes. 



8. C. carpio, (Raf.) Jordan. River Carp Sucker. 

 Body more elongate, the depth 3 in length, the head 

 small, nearly 5; longest dorsal rays shortest, reaching to 

 the 16th ray; eye small, anterior; D. 30; lat. 1. 36, the 

 largest species, approaching Ichthyohus. Ohio Valley, 

 abundant. {G. 7iuminifei\ Cope.) 



10. ICHTHYOBUS, Rafinesque. Buffalo Fish. 

 [jSclerognat/iiis, Val.) 



* Body robust, little compressed, the dorsal region not especially 

 elevated. 

 1. A bubalus, (Raf.) Ag. . Brown Buffalo - Fish. 

 Depth 3-J- in length; head the same; eye small, 6|- in 

 head; depth of head five-sixths its length; opercle very 

 wide, forming nearly half the length of head— convex 

 Mild furrowed; scales very large; dull brownish olive, 

 not silvery; D. 27; A. 10; lat. 1. 40; length (of specimen) 



