214 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



but present au iDteriuediate form ; the outer suiface of the arch standing outwards 

 and presenting a porous outer margin. The peduncle of the symphysis. is much longer 

 proportionally and more pointed than in Carpiodes and Buialichthys. The teeth are 

 very numerous, small, thin and compressed as in Carpiodes, but the lower ones are 

 gradually larger than the upper ones. Their inner edge is slanting outwards, and not 

 uniformly arched as in Buhalichfhys or truncate as in Cycleptits, the innernif st margin 

 rising somewhat in the shape of a projecting cusp." — (Agassiz, Am. Journ. Sc. Aria, 

 1855, p. 196. ) 



IciiTiiYOBUS Cope & Jordan, 1877. — " Body oblong oval, compressed ; dorsal elevated 

 in front, of 20 or more rays ; foutauelle present ; pharyngeal bones narrow, with the 

 teeth relatively thin and weak; mouth large, subterminal, jirotractile forwards." — 

 (Jordan, Proc. Ac. Nat. Sc. Phila. 1877, p. 82.) 



ANALYSIS OF SPECIES OF ICHTHYOBUS. 



•Body robust, moderately compressed, the outline somewhat elliptical, but the back 

 rather more curved than the belly ; depth 2i to 3^ in length : head very large and 

 thick, 3J iu length of body : opercular apparatus very strong, the operculum itself 

 forming nearly half the length of the head : scales very large : developed rays of 

 the dorsal 27 to 29 ; anal rays 9; ventrals 10 : scales 7-37 to 41-G: caloratiou dull 

 brownish-olive, not silvery ; fins dusky : size very large, reaches a length of nearly 

 three feet and a weight of 20 to 30 pounds bubai.us, 53. 



53. ICHTHYOBUS BUBALUS {Rajinesque) Agassiz. 

 Bed-moulh Buffalo Finh. Large-mouihed Buffalo. 



1818 — Amhlodon hiibalus Rafinesque, Journal de Physique, 421. 



Catos'omits bubalus Rafinesque, Am. Month. Mag. and Crit. Rev. 354, 1818. 



Catostomus iiibalus Rafinesque, Ich. Oh. 55, 1820. 



Icthyobus bubalus Agassiz, Am. Jonru. Sc. Arts, 2d series, xix, 196, 1855. 



Icthyobus bubalus JoitDAN, Fishes of Ind. 222, 187.'"). 



Ichthyobus bubalus Jokdan, Bull. Buffalo Soc. Nat. Hist. 95, 1876. 



Icthyobus bubalus Jordan, Man. Vert. 298, 1876. 



Icthyobus bubalus Nelson, Bull. No. 1, Ills. Mus. Nat. Hist. 49, 1876. 



Icthyobus bubalus Jordan & Copeland, Check List, 158, 1876. 



Icthyobus bubalus Jordan &, Gilbert, in Klippart's Rept. 53, 1876. 



Icthyobus bubalus Joi!Dan, Proc. Ac. Nat. Sc. Phila. 72, 1877. 



Icthyobus bubalus Jordan, Bull. U. S. Nat. Mus. ix, 34, 1877. 



Ichthyobus bubalus Jordan, Man. Vert. ed. 2(1, 322. 

 l8'ii—Scli'ro{jnathus cyjmutlla Cuviek & Valenciennes, Hist. Nat. des Poissons, xvii, 

 4/7, pi. 518. 



Sclerognathus cyprivella Stoker, Synopsis, 428, 1846. 



Ichthyobus cyprhulla Agassiz, Am. Journ. Sci. Arts, 196, 1855. 



Sclerognathus cypriuella GUNTHER, Cat. Fishes, Brit. Mus. vii, 24, 1868. 



Ichthyobus cyprinella Jordan, Man. Vert. 298, 1876. 



Ichthyobus cyprinella Jordan &. Copeland, Check List, 158, 1876. 

 1855 — Icthyobus rauchii Agassiz, Am. Journ. Sc. Arts, 2d series, xix, 196. 



