824 FISHES — CATOSXOMIDJE. 



desnriberl, interrupted in the adolt, but with perfect tubes, imperfect in part'y grown 

 specunens, entirely obsolete in the young; scales in a longitodinal series 44 to 47 in 

 nnmber, 12 r,o 14 in a transverse series from dorsal to ventrals ; doraal tia raih^r short 

 and high, with about 12 developed lajs, beginning rather nearer the Hnont than the 

 b >S6 I f the caudal ; pectoral fins moderate, not reaching ventrals, the latter not to vent ; 

 Tentr,ils rather in advance of the middle of the dorsal, their rays normally 9, rarely 8 or 

 10 ; anul fiu high and short, often more or less emarginate in males ; caudal fin moder- 

 ately forked, the lobes about equal; dir-bladder with two chambers; miles in spring 

 with th« heart covered with many siHall tubercles. 



But one species of this genus seems to be known. It is widely distributed in the 

 waters of the Western and Southern States. 



'1 his genus has been recently separated from Erimyeon, on account of the peculiar- 

 ities of the lateral line. The form of the body, the form of the mouth, and the chirac- 

 ter of the squamation differ considerably in the two genera. 



42. MiNYTEEMA MELAN0P3 (Rafiaesque) Jordan. 



Striped Sucker; Sand Sucker; Spotted Sucker; Black- 

 iiosed Sucker. 



Catostomus melanops, Kafinesque, Ich. Oh., 1 820, 57. — Kirtla.nd, Boston Joarn. Nat Hist., 



V, li-4'', 271— Storkr, Synopsis, 1840, 424. 

 Catostomus nulanopsis, Kiktland, Zool Ohio, 11^38, 168. 

 Ptyohostomus melanops, Agassiz, Am Jonrn. Sci. Aits, 2d series, xix, 1855, 204. — Cope, 



Proc. Am. Philos. Soc. Phila., 1870, 48-i. 

 Erimyzon melanops, JonoAifl, Bnll. Buffalo Soc Nat. Hist., 1>76, 95; Man, Vert., 1^76, 



294 ; Aon. Lyo. Nat. Hiat. N. Y., xi, 1877, 347 —Nelson, Bull. No. 1, Ills. Mas. Nat. 



Hist., 1876, 48 — Jorban and Copkland, Check List, 1H76, 157. 

 Minytrema melanops, Jordan, Man. Vert., 2d Ed., 1878, 318 ; Bull. U. S. Nat. Mns., Kii, 



187d, 168 

 Catostomus fasiiatas , (LeSueur MSS.) Cuv. and Val., Hist. Nat. des Poissons, xvii, 1844, 



419.— Stoker, Synopsis, 1846, 42G— Gunther, Cat. Fishes Brit. Mas , vii, 186^, 19. 

 Moxostoma vietorim, GiraED, Proc. Acad. Nat. Sci. Phila., ie£6, 171 ; U. S. Mex. B und. 



Sarv., Ichth., 1859. 35 pi. xx, f. 1-3. 

 rtychostonma haydeni, Gieard, Proc Acad. Nat. Sci. Phila., If 56, 172 ; U. S. Pao. E. E. 



Expl., X, ltf58, 220, pi. xlix, f. 1-4. 

 Teretulus haydeni, Jordan and Copeland, Check List, 1876, 157. 

 Teretulus suceUa, Jordan and Gilbert, in Klippart's Rept. Fith Comm. Ohio, 1877, 53. 



(Supposed to be C. sucetta, Lacepede, as it was perhaps in pait the C. sucM of Cuv. 



and Val , and of Bosc ) 

 EHmyzon sucetta, Jordan, Bull. U. S. Nat. Mas., x, 1877, 35. 



Description. — Body oblong, little compressed, the yonng nearly terete, the adults 

 deeper-bodied; the dorsal region not elevated ; depth about four in length, varying 

 from three in adults to four and a half in the young; head not very large ; four and a 

 half in length of body (4^- to 4^) ; not specially depressed ; mucous pores rather strong ; 

 eye small, five to six in head ; mouth quite inferior, horizontal, rather small ; scales 

 large, firm, regularly and smoothly imbricated, in 46 (44-47) longitudinal series and 

 13 (12 to 14) transverse series, not crowded forwards ; fia-rays usually, dorsal 12, 

 anal 7, ventrals 9 ; coloration dusky, with usually a black blotch behind the dorsal 



