31. CYPRINIDiE CLIOLA. IGO 



Head 35; depth 4^. A. 7; scales 5-31-3; teeth 4-4. L. 2i inches. 

 Missouri to the Rio Grande ; probably abundant. 



(Ui/bojysis mifi>iuriensis Cope, Hajxlcu's Geol. Surv. Wyom. for 1870, 1872, 437.) 



211. C. pi'ocne (Cope) J. & G. 



Body slender, with long; caudal peduncle. Muzzle obtuse. Mouth 

 horizontal, inferior, small. Thirteen rows of scales in front of the 

 dorsal. Depth of caudal peduncle one-fourth its length. Eye large. 

 Olivaceous ; a dark dorsal line and a plumbeous lateral band overlying 

 black i^igment; fins unspotted. Head 43; depth 5^. Scales 5-32-3; 

 teeth 4-4 ; A. 7. L. 2J inches. Delaware and Susquehanna Elvers. 

 One of the smallest of the Cjjprinidcc. 



(Ri/hognathtis procne Cope, Proc. Acad. Nat. Sci. Phila. 1864, 279: Hijlyopsis procne 

 Cope, Cyi)r. Penu. 385: Leuciscus jyrocne Giinther, vii, 260.) 



+t Teetla without grinding surface. (Cliola.) 



b. A black spot on the anterior edge of the dorsal and one at the base of the caudal. 



215. C. vigaSax B. & G. 



Body subfusiform, comi)ressed, not elevated. Head conical, bluntish. 

 Mouth rather small, oblique, the jaws equal, the maxillary not extend- 

 ing to the eye. Eye moderate, 3J in head. Isthmus rather broad. Fins 

 small ; the dorsal longer than high. Scales large, somewhat higher than 

 long, IG in a transverse series from dorsal to ventral. Color brownish ; 

 a dusky stripe composed of crowded dots along the lateral line; a black 

 spot at base of caudal, and one on the anterior rays of dorsal. Head 4; 

 depth 4.5. D. 9; A. 8; Lat. 1. 3G; "teeth 4-4, without grinding sur- 

 face". L. 3 inches. Arkansas to Texas. {Girard.) 



(Ccratichthys vifjllax Baird «fe Girard, Proc. Acad. Nat. Sci. Phila. ISoS, 390: Cliola 

 vigilax, rdox, and virax Girard, Proc. Acad. Nat. Sci. Phila. 1853, 192, and in U. S. 

 Pac. II. R. Snrv. x, 257,258. C. vivax is said to have scales "a good deal smaller", 

 but no data are given. The types of all three are now lost.) 



M. No black spot on anterior edge of dorsal. 



216. C chIloi':i Jordan. , 

 Body slender, coin[)ressed. Head rather small. Eye large, about 3 



in head, longer than snout. Mouth rather small, quite oblique, the 

 lower jaw included when the mouth is closed, the maxillary scarcely 

 reaching the front of orbit. Scales very large, about 12 in front of the 

 dorsal fin ; the body entirely scaly except the thoracic region. Lateral 

 line somewhat decurved. Dorsal fin beginning directly over ventrals. 

 Color pale; back greenish; belly white; side with a silvery band ; no 

 spots on fins and no dusky or plumbeous shading on the body, except 



