31. CYPRINID.E CLIOLA. 165 



tt Edges of teetli more or less serrate or crenate ; dorsal slightly behind, ventral 



(MoxiANA Girard). 



yibbosa, forbcsi, Icoitina, Ititrensis, deliciosa, aurata, formosa. 

 ** Teeth 1, 4-4, 1. 



b. Teeth with the edges serrate or crenate, usually without grinding sur- 

 face. (CYPRINELLA Girard.) 

 c. Dorsal fin without conspicuous black blotch on its upper posterior 



rays. 



d. 'No conspicuous black spot at base of caudal. 

 e. Body very deep, compressed, the depth forming about a third of 



the length umbrosa, bubalina, gunnison i. 



ee. Body slenderer, the depth 3-J 4J in length. 



suavis, lepida, billingsiana, macrostoma, ludibunda. 



dd. A conspicuous black spot at base of caudal notata, venusta. 



cc. Dorsal fin elevated, with a conspicuous black blotch on its posterior 

 rays (often obsolete in the young). 



/. A conspicuous black spot at base of caudal calliura. 



ff. No conspicuous black spot at base of caudal. 



g. Teeth without grinding surface whipplei. 



gg. Teeth with narrow grinding surface analostana. 



bb. Teeth with entire edges in the adult. (EROGALA Jordan.) 

 /(. Teeth with narrow grinding surface ; anal short. 



yalactura, eurystoma, mvea. 

 lih. Teeth without distinct grinding surface. 

 ./. Anal tin short, of 8 or 9 rays. 



Jc. A conspicuous dark blotch on upper posterior rays of 



dorsal. 



7. Adult males with the fins chiefly red ; a conspicuous 

 black spot at base of caudal. ..callislia, tricliroistiu. 

 II. Adult males without red. 



TO. A very conspicuous black spot at base of caudal. 



siigmaiura. 

 mm. No conspicuous black spot at base of caudal. 



coerulea, cldoristia. 

 . Tilt. No dark blotch on upper posterior part of dorsal. 



sonata,, 

 jj. Anal fin long, of 10 or 11 rays ; fins high. 



xcenura, pyrrhomelaa, lujpsdoptera. 



Scales not especially deeper than long, not closely imbricated. 

 * Teeth 4-4 ; species of small size. 



t Teeth with grinding surface more or less developed.* (Hybopsis Cope, non 



Agassi z. ) 

 a. Scales in the lateral line 43 or 44. 



2O2. C. toiditaaia (Cope) J. & G. 



Form and general appearance of Hyborlnjnclms notatus. Head flat 

 above. Muzzle very obtuse. Mouth small, inferior, horizontal. Fins 

 low. Scales rather small, 27 in front of the dorsal. Olivaceous above; 

 dorsal scales narrowly black-edged ; no vertebral baud ; sides and be- 

 low silvery; usually a dusky band along sides, ending in a dark caudal 



* Several of the species in this section are of doubtful validity, and some of them 

 may prove to belong to Hybognalhus. 



