EED-MOUTH BUFFALO FISH. 805 



line well developed, but not as distinct as in Carpiodes, slightly decurved anteriorly, the 

 number of scales in its course 36 to 42 ; 13 to 15 in a transverse series from dorsal to ven- 

 trala ; dorsal flu with an elongate basis, its number of rays 25 to 30, the anterior rays 

 somewhat elevated, their length about half that of the base of the fin ; caudal not much 

 forked ; anal fin not much elevated, its rays about 9 in number ; pectorals and ventrals 

 moderate, the latter with about 10 rays ; sexual peculiarities, if any, unknown ; colora- 

 tion dark, not silvery, above dusky olive; lower fins more or lees black; air bladder 

 with two chambers ; size very large. But one species is certainly known. 



27. IcHTHYOBCs BUB ALUS (Rafinesque) Agassiz. 



Red-moiith Buffalo Fisli ; L.arg'e-iiioutlied Buffalo. 



Anibludon lubalus, Rafinesque, Journal de Physique, 1818, 421. 



Catostomus iubaliis, RAFiNKSQaK, Am. Month. Mag. and Crit. Rev., 1818, 354; loh. Oh., 



1820, 55. 

 Ichthyobus Ivlalus, Agassiz, Am. Journ. Sci. Arts, 2d series, xix, 1855, 196. — Jordan, 

 Fishes of lud., 1875, 2:i2 ; Bull. Buffalo Soc. Nat. Hist., 1676, 95; Man. Vert., 1876, 

 298 ; Proc. Acad. Nat. Sci. Phila., 1877, 72 ; Bull. U. S. Nat. Mus., ix, 1877, 34 ; Man. 

 Vert., 2d Ed., 1878, 322; Ball U. S. Nat. Mus., xii, 1878, 214.— Jordan and Cope- 

 land, Check List, 1876, 153.— Jordan and Gilbert, in Klippait's Rept., 1876, 53. — 

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

 SeUrognathus cyprinella, Cuvier and Valenciennes, Hist. Nat. des Poiesons, xvii, 1844, 

 477, pi. 518.— Storer, Synopsis, 1846, 428.— Gukther, Cat. Fishes Brit. Mus., vii, 

 1868, 24. 

 Icthihyobus cyprinella Agassiz, Am. Journ. Sci. Arts, 1855, 196.— Jordan, Man. Vert., 



1876, 298.— Jordan and Copeland, Check List, 1876, 158. 

 Ichthyobus raucliii, Agassiz, Am. Journ. Sc. Arts, 2d series, xix, 1855, 19C. — Putnam, 

 Bull. Mus. Comp. Zool., 1803, 10 —Jordan and Copeland, Check List, 1876, 158. — 

 Jordan and Gilbert, in Klippart's Rept., 1870, 53. — Jordan, Man. Vert., 2d. Ed., 

 1878, 323. 

 Icihyobua stoUeyi, Agassiz, Am. Journ. Sci Arts, 2d series, xix, 18E5, 190, — Jordan and 



Copeland, Check List, 1876, 158. 

 Iclhyobvs ischyrus, Nelson, MSS.— Jordan, Proc. Acad. Nat. Sci. Phila., 1877, 72 — 

 Jordan and Copi£Lasd, Check List, 1876, 158.— Jordan and Gilbert, in Klippart's 

 Rept., 1876, 53.— Jordan, Man. Vert., 2d Ed., 1878. 

 Description. — Body robust, moderately compressed, the outline somewhat elliptical, 

 but the back rather more curved than the belly ; depth 2i to 3i in length ; head very 

 large and thick, 34 in length of body ; opercalar apparatus very strong, the operculum 

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

 the dorsal 26 to 29 ; anal rays 9 ; ventral 10 ; scales 7-37 to 41-6 ; coloration dull brown- 

 ish-olive, not silvery ; fins dusky ; size very large, reaches a length of nearly three feet 

 and a weight of 20 to 30 pounds. 

 Habitat, Mississippi Valley, generally abundant in the larger streams. 

 Diagnosis — This species is at once distinguished from the other Buffalo 

 Pishes by the large terminal mouth and very thin smooth lips. 

 Habits. — This species abounds in the Ohio River and its larger tribu- 



