CYPRINID.E. XXVI. 67 



c. Mouth very wide, the lower jaw much projecting, the maxillary reach- 

 ing to below pupil ; body elongate, compressed ; D. well behind V. ; 

 scales quite small; size small. (Clinostomus Girard.) 



d. Scales very small, 63 to 70 in the lateral line. 



150. P. elongatus (Kirtland). Body elongate, compressed ; 

 head long, pointed ; mouth larger than in any other of our Cypri- 

 nidce. Eye 4 in head ; lateral line decurved. Dusky bluish, mottled 

 with paler ; a broad black lateral band, the front half of which is 

 bright crimson in spring males. Head 4 ; depth 5. A. 9. Scales 

 10-70-5. L. 4. Penn. to Minn., chiefly northward, in clear 

 brooks. (Clinostomus proriger Cope.) 



dd. Scales larger, 48 to 55 in the lateral line. 



e. Mouth very large, the gape half head, the maxillaries reaching to 



opposite middle of orbit. 



151. P. es tor (Jordan & Bray ton). Body elliptical, compressed ; 

 head very large ; eye 4 in head ; lateral line decurved ; 23 scales 

 before D. Dark olive, mottled with darker ; sides silvery ; no broad 

 black lateral band ; males largely crimson. Head 3-f ; depth 4^. 

 A. 8. Scales 8-50-5. L. 4. Cumberland and Tenn. Rivers 

 (Lat., devourer.) 



ee. Mouth smaller, the maxillaries not reaching to opposite middle of 



eye. 

 /. Body deep, the depth in adult 3 in length. 



152. P. vandoisulus (Cuv. & Val.). Head large; eye 3^ in 

 head ; bluish, some scales irregularly blackish ; no black lateral 

 band : spring males rose-red, especially anteriorly. Head 3f . A. 8. 

 lat. 1. 53. Va. to Ga., common. (Fr. vandoise, dace.) 



ff. Body rather slender, the depth in adult 4. 



153. P. funduloides (Girard). Head and mouth smaller than 

 in any of the preceding species. Eye 3 in head. Dusky, a dark 

 lateral band with a pale streak above it ; males red below in 

 spring. Head 4. A. 8. Scales 9-48-4. Penn. to N. C. (Lat., 

 like Fundulus.) 



cc. Mouth moderate, terminal, oblique, the chin usuallj T not projecting; 

 premaxillary below level of pupil, the maxillary not reaching 

 pupil. (Tigoma Girard.) 

 g. Anal short, with about 8 rays. 



154. P. margaritus (Cope). Body robust, little compressed; 

 head blunt, thick, rounded ; mouth small, the maxillary not to eye ; 

 eye rather large ; lateral line decurved ; dorsal behind ventrals. 

 Dusky, sides plumbeous silvery, crimson in spring males. Head 

 4; depth 4. A. 8. Scales 11-58-8. L. 3. Susquehanna R. A 

 pretty fish, similar to the typical species of Plioxinus in all respects, 

 but the lateral line is complete. (Lat., pearly.) 



