5G. LEUCiscus. 253 



a. Several adult and young examples. Holston River. Prom Mr. 



Cope's Collection. 



G5. Leuciscus coccogenis. 



Iljrpsilepis coccogenis, Cope, 3IS. 



D. 10. A. 10. V. 8. L. lat. 42. L. transv. 6A/4|. 



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

 which is a little less than one-foui'th of the total (without caudal). 

 Eye of moderate size, its diameter being one-fourth of the length of 

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

 terorbital space, which is flat. Snout somewhat produced and 

 conical, the lower jaw somewhat projecting beyond the upper ; cleft 

 of the mouth rather wide, oblique, extending to below the front 

 margin of the eye. Prteorbital a little less deep than long, larger 

 than the postorbital, which is narrow, scarcely wider than the pre- 

 ceding suborbital. Origin of the dorsal fin opposite to the middle of 

 the root of the ventrals, and nearly midway between the end of the 

 snout and the root of the caudal. Caudal fin forked. Pectorals ter- 

 minating at a considerable distance from the ventrals. There are two 

 and a half longitudinal series of scales between the lateral Hue and 

 the root of the ventral fin. Basal half of the dorsal and caudal fins 

 white, the outer black ; margin of the upper jaw, base of the oper- 

 culum, and a spot on the base of the anterior dorsal rays red, A 

 black vertical streak along the humeral arch. 



Virginia. 



fl. Several fine adult and young specimens. Holston River. From 

 Mr. Cope's Collection. 



66. Leuciscus zonatus. 



Albm-nus zonatus, Agassiz, in Bullet. Mus, Compm: Zool. Camhrulge, 

 U. S. 1863, p. 9. 



D. 9. A. 10. V. 8. L. lat. 37-38. L. transv. 6|/5|. 

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

 caudal), the length of the head one-fourth. Ej^e large, its diameter 

 being one-third of the length of the head, a little more than that of 

 the snout and than the width of the interorbital space. Snout 

 slightly convex, the lower jaw somewhat projecting hei/ond the vpper; 

 cleft of the mouth of moderate width, oblique, extending to below 

 the front margin of the eye. Pra3orbital about as deep as long, 

 much larger than the postorbital, which is narrow, a Httle wider 

 than the preceding suborbital. Origin of the dorsal fin opposite to 

 that of the ventrals, and midway between the end of the snout and 

 the root of the caudal. Caudal fin forked. Pectorals terminating at 

 a considerable distance from the ventrals. There are four longi- 

 tudinal series of scales between the lateral line and the root of 

 the ventral fin. A blackish median line along the back. Body sil- 

 very, with a more or less distinct brownish band from the snout to 

 the end of the middle caudal ravs. 



