FISHES 



73 



N. hosci (Cuvier & Valenciennes). Rays of anal tin i6; scales 

 8-43-2; lower fins scarlet in males: south Atlantic States. 



33. Ceratichthys Baird and Girard. Body stout; teeth 4-4; dorsal 

 fin over ventrals and with its first ray separated from the rest by a 

 membrane: 2 species. 



C. vigilax Baird & Girard. Bullhead minnow. Length 75 mm.; 

 head 4.25; depth 4.5; color dusky olive or yellowish with a dark lateral 

 band which terminates with a black spot; dorsal fin with 8 rays, on 

 each of which is a black spot; anal rays 7; scales 8-42-6, 28 before 

 the dorsal: Ohio to Iowa, southward to Georgia and Texas; very 

 common . 



34. Hybopsis Agassiz. Minnows. Small fishes with teeth 4-4 or 

 I, 4-4, I or o; scales rather large, not closely imbricated, 32 to 39 in 



Fig. 35.- — Hybopsis alrocaiidalis {frotn Jordan cr Evennann) . 



the lateral line; first ray of dorsal fin rudimentary; dorsal fin without 

 black spot and nearly over the ventrals; anal fin with 7 or 8 rays: 

 about 35 species, many in the west and southwest. 



H. bifrenatus (Cope). Length 50 mm.; head and depth 4.2; straw- 

 color, with a black lateral band bordered by orange on the snout; 

 scales 5-36-3, 13 before the dorsal fin; body slender, lateral line very 

 short; snout very obtuse: Massachusetts to Maryland, in coastal 

 streams; not common. 



H. anogenus Forbes. Length 35 mm.; head 4.25; depth 4; color 

 dusky with a dark lateral band through the eye ending in a black spot 

 at the base of the tail fin; mouth very small and oblique; chin black; 

 snout obtuse; scales 34 to 37: western New York to northern Illinois; 

 scarce. 



H. atrocaiidalis (Evermann) (Fig. 35). Length 60 mm.; head 4.5; 

 depth 4.5 ; color olivaceous, with a black stripe through the snout and 

 eye, a dusky lateral shade and a small caudal spot; belly yellow; scales 



