31. CYPEINID.^: CLTOLA. 1G9 
Head 33; depth 4:^. A. 7; scales 5-31-3; teeth 4-4. L. inches. 
Missouri to tlie Eio Grande ; probably abundant. 
{JTyhojjsis missuriensis Cope, Hayden’s Geol. Surv. Wyom. for 1870, 1872, 437.) 
2S4. C. procaae (Cope) J. & G. 
Body slender, with long- caudal peduncle. Muzzle obtuse. Month 
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 pigment; fins unspotted. Dead 43; depth 5;^. Scales 5-32-3; 
teeth 4-4 ; A. 7. L. 24 inches. Delaware and Susquehanna Eivers. 
One of the smallest of the Cyprinidw. 
{Hybognathns 2>roc7ie Cope, Proc. Acad. Nat. Sci. Phila. 1864, 279: Hybopsis procne 
Cope, Cj-pr. Penn. 335: Lcucisciis procne Giintlier, vii, 260.) 
tt Tectli without grinding surface. (Cliola.) 
b. A black spot on the anterior edge of the dorsal and one at the base of the caudal. 
245. C. vigaSax B. &■ G. 
Body snbfnsiform, comitressed, not elevated. Head conical, bhintish. 
Mouth rather small, oblique, the jaws equal, the maxillary not extend- 
ing to the eye. Eye moderate, 34 in head. Isthmus rather broad. Fins 
small ; the dorsal longer than high. Scales large, somewhat higher than 
long, 16 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 43 . D. 9; A. 8; Lat. 1. 36; “teeth 4— 4, without grinding sur- 
face”. L. 3 inches. Arkansas to Texas. {Girard.) 
{Ccratichtbys riyilax Baird & Girard, Proc. Acad. Nat. Sci. Phila. 1853, 390:*CUoIa 
vigilax, relax, and vivax Girard, Proc. Acad. Nat. Sci. Phila. 1853, 192, and in U. S. 
Pac. R. R. Surv. x, 257,258. C. vivax is said to have scales “a good deal smaller”, 
but no data are given. The tyj)es of all three are now lost.) 
Tib. No black spot on anterior edge of dorsal. 
216. C. cSiSoa’a Jordan. 
Body slender, compressed. Head rather small. Eye large, about 3 
in head, longer than snout. Month 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 veutrals. 
Color pale; back greenish; belly white; side with a silveiy band ; no 
spots on fins and no dusky or plumbeous shading on the body, except 
