31. CYPRINID^E STYPODON. 223 



the eye. Eye large, 3 in head. Scales moderate, very silvery. Lat- 

 eral line slightly decurved. Fins rather high. Dorsal fin rather in ad- 

 vance of veutrals. Caudal fin with its rudimentary rays few and little 

 developed, the two lobes equal. Brownish above, with black dotsj 

 sides and below bright silvery. Head 4J. D. 9 ; A. 8 ; Lat. 1. CO ; teeth 

 U, 5-(4, 2). L. 4 inches. Presidio, Cal. 



(Pogonichthys argyreiosus Girard, Proc. Acad. Nat. Sci. Pbjla. 1854, 154: Leucosomus 

 argyreiosus Guuther, vii, 267.) 



97. POGOraiCHTHYS Girard. 



(Girard, Proc. Acad. Nat. Sci. Phila. 1854, 136: type Pogonichthys incequilobus B. & 

 G.=Leudscus macrolepidotus Ayrea.) 



Body elongate. Head small, conical. Mouth moderate, terminal, 

 normal ; maxillary with a well-developed barbel ; premaxillaries protrac- 

 tile. Teeth 2 % 4-5, 2, or 2, 5-5, 2, hooked, with well-marked grinding 

 surface. Scales rather large. Lateral line continuous, decurved. Dor- 

 sal fin beginning rather in advance of ventrals. Anal basis short. 

 Caudal fin with its rudimentary rays numerous and greatly developed^ 

 supported by strong apophyses of the caudal vertebrae, the upper lobe 

 of the fin considerably longer thau'the lower. Intestinal canal short 5 

 peritoneum brownish. Species of large size. (TTCO^WV, beard ; fc0uc, fish.) 



351. P. macrolepidotus (Ayres) Jor. Spill-tail. 



Body elongate, somewhat compressed, the back a little elevated, the 

 form somewhat that of Cycleptus. Head short, slender. Mouth mod- 

 erate, nearly horizontal, the maxillary reaching front of orbit ; lower 

 jaw included; preorbital longer than deep. Eye large, 4J in head; 







interorbital space convex. Dorsal fin midway of the body, rather in 

 front of the ventrals. Scales rather large, moderately imbricated. Lat- 

 eral line decurved. Fins rather large ; upper lobe of caudal half longer 

 than head. Coloration uniform, somewhat silvery. Head 4^; depth 

 3f. D. 9; A. 8; scales 10-66-6; Vert. 26 +.15; teeth 2, 5-5, 2. L. 12 

 inches. Bivers of California. Singularly distinguished from our other 

 Cyprinidce by the great development of the upper lobe of the caudal and 

 its rudimentary rays. 



(Pogonichthys Incequilobus Baird & Girard, Proc. Acad. Nat. Sci. Phila. 1854, 136 

 (August), aud U. S. Pac. E. R. Surv. x, 245: Leucosomus inaquilobus Giinther, vii, 271: 

 Lcuciscus macrolepidotus Ayres, Placer Times and Transcript, 1854, May 30 ; Jordan, 

 Proc. U. S. Nat. Mus. 1880, 326.) 



97 (6). STYPODOW Garman. 

 (Garman, Bull. Mus. Comp. Zool. viii, 90, 1881 : type Stypodon signifer Garm.) 



Body oblong, compressed, covered with large, deciduous scales. Lat- 

 eral line complete, decurved. Dorsal and anal fins short. Mouth small, 



