CYPEDTED^E. CVHI. 295 



in the closed mouth; body much compressed; depth 3f in 

 length; D. I, 8; A. I, 8; lat. 1. 35 to 40; L. 3|. Teeth 

 usually more or less serrate. Cayuga L., N. Y. (8. H. 

 Gage), to N. J., Va., and Ind., abundant. In full breed- 

 ing dress one of the most exquisite of all our fishes. 

 L. kentuckiensis, Kirt., not of Raf. (Photogenis spilop- 

 terus, Cope, is probably based on young forms of this 

 species. Leuciscus spirlingulus, Val., is more likely 

 Hybopsis hudsonius.) 



8. LYTHRURUS, Jordan. RED- FINS. 



1. L. cyanocephalus, Copeland. BLUE - HEADED RED- 

 FIX. HOY'S RED FISH. Body short, stout and deep, 

 the depth 4 in length; the axis of the body being half 

 nearer the ventral than the dorsal outline; head very 

 short and deep, 4^ in length; mouth large, very oblique; 

 D. I, 8; A. I, 12; lat. 1. 46. Head bright glaucous blue 

 in males in spring; sides and fins chiefly crimson, the 

 black dorsal spot conspicuous; teeth 2, 4 4, 2. South- 

 ern Wisconsin; near the next but much more chubby, 

 with somewhat the aspect of Pimephales. 



2. L. diplnmius, (Raf.) Jordan. RED - Fix. Bright 

 steel blue, with purplish shades, silvery below; a large 

 black spot on the anterior rays of dorsal in front; fins 

 otherwise unicolor, plain olivaceous in $, brilliant brick 

 red in spring males; scales with more or less dark edg- 

 ing; nuptial tubercles minute, very numerous, whitish, 

 chiefly on the upper surface of head; body much com- 

 pressed; back elevated; head deep, rather obtuse; depth 

 3f in length; D. I, 9; A. 1, 10; lat. 1. 44; L. 3. Western 

 streams, generally abundant; an exceedingly brilliant 

 fish in the breeding season; known at all times by the 

 dorsal spot and compressed body, with large fins and 



