246 CTPKINIDiE. 



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

 mandible projectincj beyond the upper javj ; lips moderately deve- 

 loped. Suborbitals narrow ; prajorbital scarcely longer than deep, 

 larger than the jjostorbital, which is scai'ccly wider than the pre- 

 ceding bone. TJie origin of the dorsal fin 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 series 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 gill-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. 



Squalius proriger, Cope, Proc. Ac. Nat, Sc. Philad. 1864^ p. 280. 

 CUnostomiis proriger, Cope, Trans. Am. Phil, Soc. xiii. p. 375. 



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



The lower jaiv presents a symphysial hnob 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 punctulate anteriorly. 



Pharyngeal teeth 5 . 2 — 1 . 4. {Cope,) 



Ohio. Three inches long. 



53. Leuciscus margarita. 



Clinostomus margarita, Cope, 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 snoiit, 

 which is obtuse. Cleft of the mouth oblique, nai-^ow, with the jaws 

 even in front, the maxillary scarcely reaching to below the front 

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

 ventrals, 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. {Cope.} 



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



