214 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



but present an intermediate form ; flie outer suiface of the arch standing ontwardt* 

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

 proportionally aud more pointed than in Carpiodea and Bubalichlhya. The teeth are 

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

 gradually larger than the \ipp<n- ones. Their inner edge is slanting outwards, and not 

 uniformly arched as in BuhalichthyH or truncate as in Ci/cleptua, the innermcst margin 

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

 1855, p. 196. ) 



IciiTiiYOBUS 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, Bubterminal, protractile forwards."— 

 (JoRD.\N, Proc. Jc. Nat. Sc. Phila. 1877, p. 82 ) 



ANALYSIS OF SPFXIKS OK ICHTll VwUU.s. 



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

 rather more curved than the belly ; depth 2* to '.Ji in length : head very large and 

 thick, :!J in length of body : opercular api)aratU8 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-:{7 to 41-0 : coloration dull 

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

 three feet and a weight of 20 to '30 pounds bi'Daix's, 53. 



53. ICHTHYOBCJS BUB ALUS [Rajinesque) Agassiz. 



Bed-7noiilh Hiiffalo Finh. Large-mouthed Buffalo. 



1818 — Amhlodon buhulnn Raiinesquk, Journal de Pliysique, 421. 



Catosomns bubaliis Rakinfsque, Am. Mouth. Mag. and Crit. Rev. 354, 1818. 



Catostomim babalus RaI'INESQUE, Ich. Oli. 55, 1820. 



Jcthi/obiis biibalua Agassiz, Am. Journ. Sc. Arts, 2d series, xix, 196, 1855. 



Icthyobus bubalus Jordan, Fishes of Ind. 222, 1875. 



IchtUijubnH bubaluH Jordan, Bull. Builalo Soe. Nat. Hist. 95, 1876. 



Icthyobub biibalun Jordan, Man. Vert. 298, 1876. 



IcthyobuH bubaliiH Nelson, Bull. No. 1, Ills. Mus. Nat.^Sist. 49, 1876. 



Irthjiohiin hitbdhis JoRDAN & CoPKLAND, Clitck List, 158, 1876. 



Jctlu/obiis biibahiH .Jordan &- Gilbert, in Klipiiart's Repr. 53, 1676. 



Icthy ibiin biibuliin Jordan, Proc. Ac. Niit, Sc Phila. 72, 1877. 



IctliynbuH bubaliiH Jordan, Bull. U. S. Nat. Mus. ix, 34, 1877. 



lehthjiobiiH bubahtH Jordan, Man. Vert. t«1.2il,322. 

 \SAA—SeUro(jnathHHcijprineUaCv\iv,\\. & Valenciennes, Hist. Nat. des Poissons, xvii, 

 4/7,i.l.51M. 



Scleroi/valliuH ct/prinella .Storer, Synopsis, 428, 1846. 



IchthijobuH n/priiietla Aoa.ssiz, Am. Journ. Sci. Arts, 196, 185.">. 



Scltrof/iialhiis riipriiieUa G( NTiiKR, Cat. Kishes, Brit. Mus. vii, J 1, l'^6'^. 



IchtliijobuH lyprimUa Jordan, Man. Vt-rl. 298, 187(1. 



Ichlbyobua cypi iiifUit .Ioijdan ».V CNirki.and, Check List, 158, 1876. 

 1855 — IcthyobuH rauvhii AiiA.-^MZ, Am. Journ. So. .\rtH,2d series, xix, 196. 



