56. LEUCISCTTS. 255 



69. Leuciscus hypselopterus. 

 Albumus formosus, Putnam, MS. {not Algansea formosa, Girard). 

 D. 9. A. 11. L. lat. 38. L. "transv. 6|/5. 



The height of the body is equal to the length of the head, and 

 one-fourth of the total (without caudal) ; the diameter of the eye 

 is more than the length of the snout, and one-third of that of the 

 head. Snout rather pointed ; cleft of the mouth oblique, with the 

 jaws even in front, extending to below the front margin of the eye. 

 The origin of the dorsal fin is behind the ventrals, and midway 

 between the root of the caudal and the eye ; its last ray is opposite 

 to the first anal ray. Dorsal Jin and, particularly, anal fin elevated, 

 the longest anal rays being longer than the base of the fin. A 

 broad diffuse brownish band along the side, terminating in a dark 

 spot on the root of the caudal fin. Dorsal fin blackish, with the 

 base and top colourless. 



Pharyngeal teeth 4 . 1 — 1 . 4 ; gill-rakers rudimentary ; pseudo- 

 branchise. 



Mobile. Two inches long. 



rt. Two inches long. Mobile. Presented by Th. Moore, Esq. 



70. Leuciscus rubrifrons. 



Albumus rubrifrons, Cope, Proc. Ac. Nat. Sc. Philad. 1865, p. 85. 

 Alburnellus rubrifrons, Cope, Trans. A^n. Phil. Soc. xiii. p. 388, pi. 13. 

 fig. 3. 



D. 9. A. 2/10. Y. 8. L. lat. 39. L. transv. 6/?. 



The height of the body is two-ninths of the total length (without 

 caudal), the length of the head one-fourth. Snout moderately 

 pointed, mouth oblique, with the lower jaw slightly projecting beyond 

 the vpper ; the maxillary extends to below the front margin of the 

 orbit. The diameter of the eye is as long as the snout, and one- 

 fourth (according to the figure two-sevenths) of the length of the 

 head. Ventral fins in advance of dorsal, the origin of which is con- 

 siderably nearer to the root of the caudal than to the end of the 

 snout. Pectoral fins terminating at some distance from the root of 

 the ventrals. There are two or three longitudinal series of scales 

 between the lateral line and ventral fin. A dark lateral band. 



Pharyngeal teeth 4 . 2 — 2 or 1 . 4. {Cope.) 



Pennsylvania. 



71. Leuciscus copii. 



Alburnellus jaculus, Cope, I. c. p. 387. 



D. 10. A. 10. V. 8. L. lat. 39. L. transv. 6/5. 

 The height of the body is one-seventh of the total length (without 

 caudal), the length of the head two-ninths. Eye of moderate size, 

 its diameter being a little more than one-fourth of the length of the 

 head, less than that of the snout, and equal to the width of the in- 

 teroi'bital space,, which is flat. Snout pointed, the lower jaw some- 

 what projecting beyond the upper ; cleft of the mouth of moderate 



