31. CYPRINID^ 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 ventrals. 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 4^. D. 9; A. 8; Lat. 1. 60; teeth 
2, 5-(4, 2). L. 4 inches. Presidio, Cal. 
{Pogotiichthys argyreiosus Girard, Proc. Acad. Nat. Sci. Pbila. 1854, 154: Leucosomus 
argijreiosus Giiuther, vii, 267.) 
’ »y.— POGONICHTH¥S Girard. 
(Girard, Proc. Acad. Nat. Sci. Phila. 1854, 136: typo Pogonichthys incequilohus B. & 
G.=Leimscus macrolepidotus Ayres.) 
Body elongate. Head smgil], 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 apoiihyses of the caudal vertebrm, the upper lobe 
of the fin considerably longer than the lower. Intestinal canal short ; 
peritoneum brownish. Species of large size, beard ; IxOvq^ fish.) 
351. P. macrolepidotus (Ayres) J or. -SpUt-iail. 
Body elongate, somewhat compressed, the back a little elevated, the 
form somewhat that of Gycleptus. Head short, slender. Mouth mod- 
erate, nearly horizontal, the maxillary reaching front of orbit ; lower 
jaw included; preorbital longer than deep. Eye large, LJ 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 4i; depth 
33. D. 9; A. 8; scales 10-GG-G; Vert. 26 -f 15; teeth 2, 5-5, 2. L. 12 
inches. Bivers of California. Singularly distinguished from our other 
Gyprinidce by the great development of the upper lobe of the caudal and 
its rudimentary rays. 
{Pogonichthys incequilohus Baird «& Girard, Proc. Acad. Nat. Sci. Phila. 1854, 136 
(August), aud U. S. Pac. R. R. Surv. x, 245: Leucosomus incequilohus Giintlier, vii, 271: 
Leuciscus macrolepidotus Ayres, Placer Times and Transcript, 1854, May 30 ; Jordan, 
Proc. U. S. Nat. Mns. 1880, 326.) 
07 (h). STYPODON Gannan. 
(Gannan, Bull. Mus. Comp. Zool. viii, 90, 1881 : type Slypodon signi/er Garm.) 
Body oblong, compressed, covered with large, deciduous scales. Lat- 
eral line complete, decurved. Dorsal and anal fins short. Mouth small, 
