CYPKINID.E. CVHI. 285 



ventrals; body elongate, with the 

 mouth oblique, terminal and the head 

 more or less pointed; scales large; 

 anal basis somewhat elongate, the rays 

 usually 10 teeth usually 2, 44, 2. 



NOTROPIS, 9. 



mm. Dorsal fin beginning over ventrals; body 



rather shorter, but similar as to form, 



form of head, mouth, scales, etc. ; anal 



basis rather short ; the rays usually 8. 



CLIOLA, 10. 



II. Suborbital, interopercle and base of mandible 

 much dilated, cavernous, crossed by muc- 

 ous channels, (readily seen under any cir- 

 cumstances by looking at the head of the 

 fish from below) ; snout thick ; mouth 

 small, inferior; teeth 1, 4 4, 0; dorsal 

 over ventrals. . . ERICYMBA, 11. 

 ttl. Lips thick, fleshy, the lower enlarged be- 

 hind; mouth small, inferior; teeth 4 4; 

 dorsal fin beginning anterior to ventrals; 

 elongate species,resembling young Suckers. 

 PHENACOBIUS, 12. 

 Tih. Teeth in the principal row 5 5 or 4 5 ; dorsal 



entirely behind ventrals. 



n. Anal basis not elongate, of nine or fewer rays ; 

 teeth entirely without masticatory surface, 

 two-rowed. 



o. Mouth normally large and oblique; scales 

 small ; (a very large group embracing a very 

 wide variety of forms ; the typical Western 

 species are very large, with somewhat the 

 aspect of Esox, with large mouth, depressed 

 head, arched back and very slender caudal 

 peduncle ; the Eastern species are small, but 

 typically have very large oblique mouths 

 and brilliant coloration in the spring; no 

 black spot at the base of the dorsal in front.) 



GILA, 13. 



