CYPBINID^E. CVIII. 271 



g. Lateral line incomplete or wanting ; mouth oblique ; 

 size small. 



h. Scales very small ; lat. 1. more than 60 ; dorsal 

 behind ventrals. 



i. Body very stout ; head short and heavy ; mouth 

 large; a single black lateral band; back 

 unspotted ; alimentary canal short ; teeth two- 

 rowed, inner 5-4, without masticatory surface. 



PHOXINUS, 14. 



ii. Body moderately stout, graceful ; sides with one 

 or two black bands ; back spotted ; belly, etc., 

 brilliant red in spring; alimentary canal 

 elongate; teeth one-rowed, 4-5 or 5-5, with 

 masticatory surface. . CHKOSOMUS, 13. 



Jih, Scales rather large ; lateral line less than 40 ; 

 small species with a dark lateral band; teeth 

 4-4 or 5-4, with masticatory surface. 



HEMITREMIA, 12. 



gg. Lateral line complete (rarely obsolete on the last 

 four or five scales) ; alimentary canal short. 



j. Dorsal decidedly behind ventrals; mouth oblique, 

 usually large, the lower jaw commonly project 

 ing ; elongated species, generally of small size, 

 more or less compressed, with the caudal 

 peduncle long; males rosy and with small 

 tubercles in spring ; teeth two-rowed. 



k. Scales very small ; lat. 1. 45 to 75 ; dorsal without 

 spots ; scarcely silvery ; sides and below red 

 in spring; anal fin short, with eight or nine 

 rays ; teeth 5-4 (inner series), without masti 

 catory surface GILA, 15. 



kk. Scales rather small, especially in front of dorsal, 

 larger along the sides and crowded so that the 

 exposed surfaces are decidedly higher than 

 long as in iMxilus; lat. 1. 40 to 50; fins very 

 high, bright red in the spring, a large black 

 spot at base of dorsal in front ; anal fin long, 



