214 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



but present an intermediate form ; the outer surface 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 Bubalichthys. 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 Bubalichthys or truncate as in Cyclepius, the innermost margin 

 rising somewhat in the shape of a projecting cusp." (AGASSiz, Am. Journ. Sc. Arts, 

 1855, p. 196. ) 



ICHTHYOBUS Cope & Jordan, 1877. " Body oblong oval, compressed : dorsal elevated 

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

 teeth relatively thin and weak; mouth large, subterminal, protractile 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 2 to 3 in length : head very large and 

 thick, 3J in 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 41-6 : coloration 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 BUBALUS, 53. 



53. ICHTHYOBUS BUBALUS (Rafinesque) Agassiz. 



Bed-mouth Buffalo Fish. Large-mouihed Buffalo. 



1818Arnbhdon bubalus RAFINESQUE, Journal de Physique, 421. 



Catosiomm bubalus RAFINESQUE, Am. Month. Mag. and Crit. Rev. 354, 1818. 



Catostomus bubalus RAFINESQUE, Ich. Oh. 55, 1820. 



Icthyobus bubalus AGASSIZ, Am. Journ. Sc. Arts, 2d series, xix, 196, 1855. 



Icthyobus bubalus JORDAN, Fishes of lud. 222, 1875. 



Ichthyobus bubalus JORDAN, 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'a Rept. 53, 1876. 



Icthyobus bubalus JORDAN, Proc. Ac. Nat. Sc. Phila. 72, 1877. 



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



Ichthyobus bubalus JORDAN, Man. Vert. ed. 2rl, 322. 



1844 Sclerognathus cyprinella CUVIER & VALENCIENNES, Hist. Nat. des Poissons, xvii, 

 4/7, pi. 518. 



Sclerognathus cyprinella STOKER, Synopsis, 428, 1846. 



Ichthyobus cyprinella AGASSIZ, Am. Journ. Sci. Arts, 196, 1855. 



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



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



Ichthyobus cyprinella JORDAN & COPKLAND, Check List, 158, 1876. 

 -1855 Icthyobus rauchii AGASSIZ, Am. Journ. Sc. Arts, 2d series, xix, 196. 



