J.OI CYriUNlDJi. 



slightly overlapping the lower ; the maxillary does not extend to 

 below the front margin of the orbit. Origin of the dorsal fin a little 

 nearer to the root of the caudal than to the end of the snout, opposite 

 to the middle of the root of the ventral. Caudal fin forked ; pectoral 

 fins not extending to the ventrals. There are three or fom* longi- 

 tudinal series of scales between the lateral line and ventral fin. 

 Dorsal fin with the interradial membrane black, sometimes between 

 all the rays, sometimes between the three last only ; caudal fin white 

 at the base. Upper surface of the head of the male with tubercles 

 during the spawning-season. Pharyngeal teeth compressed, hooked, 

 with a crenidate edge, 4 . 1 — 1 . 4. 



United States. 

 a. Adult. Pennsylvania. Purchased of 0. Salviu, Esq. 

 h-f. Fine specimens. Holston River. Received from Mr. Cope as 

 Hyi)silejpis galactm-us (Cope) . 



63. Leuciscus photogenis. 



Squalius photogeuis, Cope, Proc. Ac. Nat. Sc. Philad. 1804, p. 280. 

 Photogenis leucops, Cope, Trans. Am, PJiil. Soc. xiii. p. 379, pi. 12. 

 fig. 6. 



D. 11. A. 10. Y. 9. L. lat. 39. L. trausv. 5/5. 



The length of the head is contained four times and a fourth in 

 the total (-without caudal), the 7ieir/ht of the body six times or Jive 

 times and a half. The diameter of the eye equals the length of the 

 snout (in adult examples), and is two-sevenths of that of the head. 

 Mouth oblique, under jaw scarcely projecting ; maxillary scarcely 

 extending to the vertical from the front margin of the orbit. 

 Scales caducous. Origin of the ventral fins little anterior to that 

 of the dorsal, the origin of which is a little nearer to the base of 

 the caudal than to the end of the snout. Tie ventral fins terminate 

 at some distance from the vent. A silvery lateral band. 



Pharyngeal teeth 4 . 1 — 1 . 4. 



Pennsylvania and Virginia. 

 a-d. Adult. Kenhawa River. From Mr. Cope's Collection. 



64. Leuciscus telescopus. 

 Photogenys teleseopus, Cope, 3IS'. 



D. 10. A. 11. V. 8. L. lat. 35. L. transv. 5/5. 



The length of the head is contained four times in the total (with- 

 out caudal), the height of the body four times and two-thirds. Tlie 

 diameter of the eye is a little more than the length of the snout (in 

 adult examples), and one-third of that of the head. Mouth oblique, 

 under jaw scarcely projecting ; maxillary scarcely extending to the 

 vertical from the front margin of the orbit. Scales caducous. Origin 

 of the ventral fins somewhat anterior to that of the dorsal, the origin 

 of which is a little nearer to the base of the caudal than to the end 

 of the snout. The ventral fins extend nearly to the vent, Silvery, 

 plumbeous along the middle of the side of the tail. 



Virginia. 



