REPORT OF COMMISSIONER OF FISH AND FISHERIES. [16] 



138. Galeichthys felis LinnjBUS. N. S. (110, 111) 



139. Galeichthys platypogon^ Giinther. P. 



140. Galeichthys brandti* Steindachner. P. 



56.— iELURICHTHYS Baird & Girard. (58) 



141. .ailurichthys marinus Mitchill. S. (112) 



142. .aJlurichthys panameusis^ Gill. P. 



143. .ffilurichthys pinnimaculatus^ Steindachner. P. 



Order N.— EVENTOGNATHI. (L) 

 Family XXXI.— CATOSTOMID^. (30) 



57.— ICTIOBUS Rafinesque. (59, 60, 61) 

 $ Sclerognathua Cuv. & Val. (59) 



144. Ictiobus cyprinella Cuv. & Val. Vw. (113) 



$ Ictiobua. (60) 



145. Ictiobus urus Agassiz. Vw. (114) 



146. Ictiobus bubalua Rafinesque. Vw. (115) 



^ Carpiodea Rafinesque. (61) 



147. Ictiobus carpio ^ Rafinesque. Vw. (116) 



148. Ictiobus velifer " Rafinesque. Vw. (120) 

 148 b. Ictiohus velifer Mson Kgamiz. Vw. (119) 



148 c. Ictiohus velifer tumidus HaHvHi &, Gixaxd. wV. (117) 



' Arim plalypogon Giinther, V. 147 ; Jordan & Gilbert, Bull. U. S. Fish Comm., 1882, 

 44 ; Mazatlan to Panama. 



* Ariu8 brandti Steindachner, Icliethyol, Beitr., IV, 21, 1875 ; Jordan & Gilbert, 

 Bull. U. S. Fish Comm., 1882, 39; Mazatlan to Panama. 



^ jSilurichthys panamensis Gill. Proc. Ac. Nat. Sci., Phila., 1863, 172 ::^^lurichthys nu- 

 clialia Giinther, V, 179, 186^i = ^Elurichthys panamensis Jordan & Gilbert. Bull. U. S. 

 Fish Comm., 1882, 35; Mazatlan to Panama. 



^ ^ilurichthys pimmnacitlatiis Steindachner, Ichth., Beitr., IV, 15, 1875, Jordan & 

 Gilbert, Bull. U. S. Fish Comm., 1882, 34 ; Mazatlan to Panama. 



^This species is very distinct from the others referred to Carpiodea. Its body is 

 almost fusiform, the deptli about 3 times in length, the head 4^, and the first ray 

 of the dorsal not more than half the length of the base of the fin. 



''Excepting /. carpio, all the other specimens of Carpiodes which I have examined 

 fro n points west of the Allegheny Mountains seem to me to belong to a single ex- 

 tremely variable or polymorphous species, /. velifer. As varieties, we may perhaps 

 recoginize tumidiiH (^yrayi), with high back and small eye; bison (=damali8), with 

 large eye, moderate fins, and snout little obtuse ; velifei; with snout little obtuse, and 

 the dorsal tin very high, and difformis, with very blunt snout, large eye, and very 

 high fins. These forms, however, appear to intergrade perfectly. 



