246 CYPBINIDiE. 



wide, the maxillaiy extending beyond the front margin of the eye ; 

 mandible projectinfj heijond the upper jaw ; lips moderately deve- 

 loped. Suborbitals nan'ow; pricorbital scarcely longer than deep, 

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

 ceding bone. Tlie origin of the dorsal Jin is behind the vertical from 

 the base of the ventral, and somewhat nearer to the root of the caudal 

 than to the end of the snout. Caudal fin forked. There are seven 

 longitudinal scries of scales between the lateral line and ventral fin, 

 A more or less conspicuous bluish or blackish band along the side of 

 the head and body. 



Pharyngeal bones rather narrow, with two series of compressed, 

 hooked teeth, 4 . 2 — 2 . 5 or 4. Gill-rakers short, pointed. The 

 attachment of the giU-membrane to the isthmus takes place opposite 

 to the hind margin of the orbit. 



United States. 

 a. Adult. New York. Presented by Th. Moore, Esq. 



52. Leuciscus proriger. 



Squaliiis proriger, Cope, Proc. Ac. Nat. Sc. Philad. 1804, p. 280. 

 Clinostomus proriger, C'ojw, Trans. Am. Fhil. Soc. xiii. p. 375. 



D. 1/8. A. 1/9. V. 8. L. lat. 62. L. transv. 10/?. 



The loiver jaiv presents a symphtjsial knob beyond and above thepre- 

 maxillary border ; end of the maxillary opposite to the middle of the 

 pupil. The length of the head is contained four times in the total 

 to the concavity of the tail, the height of the body five times and 

 one-fourth. The diameter of the eye is one-fourth of the length of 

 the head. Ventral fins a little in advance of dorsal, not reaching 

 the vent ; dorsal fin somewhat nearer to the base of the caudal than 

 to the end of the snout. There are five longitudinal series of scales 

 between the lateral line and ventral fin. Sides punctulatc anteriorly. 



Pharyngeal teeth 5 . 2 — 1 . 4. (Cope.) 



Ohio. Three inches long. 



53. Leuciscus margarita. 



Clinostomus margarita, C'o/je, I. c. p. 377, pi. 13. fig. 1. 



D. 9. A. 9. V. 8. L. lat. 58. L. transv. 11/?. 



The height of the body equals the length of the head, and is one- 

 fourth of the total (without caudal). The diameter of the eye is one- 

 third of the length of the head, and more than that of the snout, 

 which is obtuse. Cleft of the mouth oblique, narrow, with the jaws 

 even in front, the maxUlary scarcely reaching to below the fi-ont 

 margin of the orbit. Origin of the dorsal fin bcliuid that of the 

 vcntrals, and nearer to the root of the caudal than to the end of the 

 snout. Pectoral terminating at some distance from the ventrals. 

 There are eight or nine longitudinal series of scales between the 

 lateral line and ventral fin. 



Pharyngeal teeth 5 . 2 — 2 . 4. (Copje.) 



From a tributary of the Coucstoga, near Lancaster, Pennsylvania. 



