544 PROCEEDINGS OF THE ACADEMY OF [DeC, 



olivaceous in color, sides and lower surface silvery-white. Spring 

 males have the forehead, side of head and dorsal base rosj^-red, and the 

 snout tuberculous. Along base of anal row of dark specks, and dark 

 streak down middle of back. Said to reach 2f inches. 



Notropis photogenis (Cope). 



Squalius photogenis Cope, Proc. Acad. Nat. Sci. Phila., 1864, p. 280. 

 Youghiogheny River, Pennsylvania. 



Head 4; depth about 5 (emaciated); D. iii, 7, i; A. iii, 8?; P. 

 i, 12?; V. i, 7; scales about 30? (squamation injured) + 2; scales 

 above 1. 1. 6; scales below 1. 1. 4; predorsal scales 16; head width ly^^ 

 its length; head depth at occiput If; snout 3^; eye 3|; maxillary 3^; 

 interorbital 3; first branched dorsal ray 1|; anal ray 1^; least depth 

 of caudal peduncle 3; upper caudal lobe 1; pectoral 1|; ventral If. 



Body elongated, compressed, edges apparently rounded, profiles 

 similar, deepest at dorsal origin. Caudal peduncle compressed, least 

 depth 2^ its length. 



Head compressed, flattened sides convergent below, profiles similar. 

 Snout convex, length f its width. Eye large, little longer than deep, 

 high, near first 7 in head. Mouth inclined, moderate, jaw edges firm. 

 Premaxillaries protractile. Maxillary slender, to eye front. Man- 

 dible depressed, rami well elevated inside mouth, symphysis slightly 

 protruding in front when mouth closes. Lips rather thin. Tongue 

 fiesh}^ depressed, rather far back. Nostrils together on snout side 

 above near eye, posterior larger. Interorbital broadly convex, Pre- 

 orbital width about | its length, latter H in eye. Postorbital width 

 equals pupil, other suborbitals narrow. 



Gill-opening forward to last third in head. Rakers 2 + 7 weak 

 points, longest about 4 in filaments, latter 2J in eye. Pseud obranchiae 

 little shorter than filaments. Isthmus width about 1|- in pupil, surface 

 flattened. Teeth 2, 4-4, 2, hooked, with slight grinding-surface. 



Scales about uniform, in longitudinal series parallel with 1. 1., little 

 smaller on breast. No evident axillary ventral scale. L. 1. continu- 

 ous, well decurved, ascending rather low along caudal peduncle side. 

 Tubes simple, well over scales, though not quite to margins. 



Dorsal origin midway between front nostril and caudal base, grad- 

 uated down from first branched ray or longest, depressed f to caudal 

 base. Anal origin trifle behind dorsal base, firet branched ray highest 

 depressed f to caudal base. Caudal well forked, pointed lobes about 

 equal. Pectoral f to ventral, upper rays longest, ^^entral inserted 

 little before dorsal, reaching anal? 



Color in alcohol plain pale brownish generally, of uniform tint. Iris 

 with slight silvery tinge. 



