62 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY II. 



Fin-rays : — D. I, 8 ; A. I, 8 ; V, 8. Dorsal fin inserted slightly behind 

 ventrals ; pectorals scarcely reaching § to ventrals, the latter to vent. 



Scales moderately elevated, 6-44-3 ; lateral line strongly decurved, 

 forming an abrupt flexure just before the ventrals,— a peculiarity usually 

 well marked and characteristic. 



Teeth 1, 4-4, 1, strongly crenate. 



Color in spirits pale ; sides silvery ; a pretty distinct black blotch on 

 last rays of dorsal, as in G. analostana ; a large, distinct, black caudal 

 spot, ovate in form, half larger than eye, and extending up on the mid- 

 dle rays of caudal ; the coloration therefore nearly that of Photogenis 

 stigmaturus. 



Length 4^ in ches. 



Types, No. 6865, United States National Museum, from Black War- 

 rior Eiver, Alabama. Collector, Prof. Winchell. Many specimens. 

 Other specimens from Tangipahoa River, Louisiana, are also in the col- 

 lection. 



The species seems to resemble 0. cercostigma Cope most, having a 

 similar coloration ; but that species is said to possess the teeth 2, 4, and 

 to have somewhat different proportions. Several other similarly col- 

 ored species of Photogenis and Cyprinella inhabit our south^yestern 



waters. 



44. PHOTOGENIS GEANDIPINNIS, sp. nov. 



Body short, much compressed ; back elevated ; the form generally 

 that of a young Notemigonus. Depth 4 in length. Head short, 4| in 

 length, pointed, flattened above ; mouth large, very oblique, the jaws 

 just equal ; eye large, 3 in head, about equal to snout and to interorbital 

 space. 



Flu-rays : — Dorsal I, 8 5 anal 1, 10 or 11. Dorsal fin entirely posterior 

 to ventrals, midway between eye and base of caudal, the fin greatly 

 elevated, the longest ray being a little longer than head: anal fin also 

 greatly elevated, reaching to within one eye's diameter of base of cau- 

 dal; in smaller specimens less elevated, but in all very large, larger 

 than in any other Cyprinoid known to me. 



Scales with the exposed edges very narrow, 6-35-3; 16 large scales 

 before dorsal ; lateral line much decurved. 



Color disappearing in alcohol ; dorsal fin with the large black blotch, 

 found in all the species of this group, unusually large and distinct, spread- 

 ing forward on the anterior rays ; a distinct black caudal spot, smaller 

 than eye and deeper than long, running up on the middle rays; sides 

 shining plumbeous; a very distinct bright silvery band from upper half 



