31. CYPRINIDiB MINNILDS. 193 



fins plain. Head 4| ; depth 4J. D. 8; A. 8; scales 5-40 ?-3. L. 3^ 

 inches. Arkansas Kiver. [Girard.) 



{Alburnopii -ihumardi and iUecebro9n-i (Jirani, Proc. A«a<i. Nat. Sci. Pbila. 18.'">6, 194, 

 and U. S. Pac. R. R. Surv. x, 261, 262.) 



*i75. JVL. blcnniiis (Grd.) .T. &. G. 



Body luodeiiitely el()uj>iite. Head moderate, the snout short and 

 strongly convex, so that the mouth is nearly horizontal, the upper lip 

 being below the level of the eye, lower jaw shorter than upper, max- 

 illary extending beyond front of eye. Dorsal directly over ventrals, 

 nearer snout than caudal. Scales deeper than long. Lateral line de- 

 curved. Head 4^; depth 4.^. I). 8 ; A. 7 ; scales 0-40 ?-3. L. 3^ inches. 

 Arkansas River. {Girard.) 



(Alburnops blennius Grd. Proc. Acad. Nat. Sci. Phila. 1656, l'J4, and U. S. Pac. R. R. 

 Surv. X, 261.) 

 ft Teeth without evident grinding surface. 



a. Teeth with the edges senrate ; scales closely imbricated. 



^76. in. cercostig^ina (Cope) J. & G. 



" Teeth 2, 4-4, 2, with sharp, serrate edges (without grinding surface). 

 Dorsal fin inserted 2 scales behind that above insertion of the ventrals. 

 Dorsal line compressed, elevated, rising regularly from end of muzzle. 

 <3ranium convex above. Muzzle narrowed in i^roportion, slightly ov(fc- 

 hanging mouth. Bye 4=^ in length of head, 1.^ in length of muzzle, and 

 2 in interorbital width. End of maxillary opposite posterior margin of 

 nares. Ventral outline less curved than dorsal. Caudal peduncle 

 rather stout. Isthmus narrow. Scales rather elevated, 8-39-3. Lat- 

 eral line -gently decurved over ventrals. Head 4^ in length to origin of 

 caudal, I scale less than depth at dorsal. The pectorals nearly reach 

 the vent rals, and the latter attain the vent. Radii: D. 8; A. 8; the 

 longest (anal) ray four thirds its base and three-sevenths distance to 

 longest fulcrum at origin of caudal. Total length 4.} inches. Color 

 bright olive above, without line or spot ; below and sides, from fifth row 

 of scales above, gohlen silvery; all the fins, except the pectorals, with 

 white i)igment at their bases, without markings ; a large, round black 

 spot at base of caudal." Peail River, Mississippi. {Cope.) The num- 

 ber of teeth in the inner row as above described renders it necessary 

 for us to refer this fish to the genus Minnilufi. Its affinities, however, 

 are evidently with CUola, and the recorded dentition may be abnormal. 



(Cyprinella cercoatignia Cope, Proc. Acad. Nat Sci. Phila. 1867, 157.) 

 €nj: Teeth not serrate; acalos loosely iiubricaied, scarcely higher than h)ug. 



h. Dorsal fin inserted dii-ectly over the ventrals; anal rays 7-9; eye very large; 

 scales large. {'^ Episema"* Cope &. .Jordan.) 



* Name preoccupieil. 

 Bull. Nat. Mus. No. IG 13 



