31. CYPRINID^ ORTnODON. 
151 
nearly terete, its length contained 4f times in the length of the body, its 
least depth 2f in its length. Head moderate, 4^ in length of body, 
bluntish, the profile considerably rounded, the interorbital space 
strongly convex. Mouth horizontal, subinferior, overlapped by the 
broad, blunt snout, its breadth considerable, but the maxillary not ex- 
tending far back, to opposite the front of the eye. Upper jaw pro- 
tractile, covered with a fleshy lip, inside of which is a small, straight, 
cartilaginous plate, similar to that on the lower jaw, but much smaller 
and not evident externally". Lower lip covered with a firm cartilagi- 
nous plate, sharp externally, the upper surface being formed by its 
bevelled edge. The transverse width of this plate is between four and 
five times its (longitudinal) breadth. The plate extends in nearly a 
straight line from one angle of the mouth to the other; its transverse 
width is contained times in the length of the head. Eye rather 
large, 5^ in head. If in snout, its position anterior and not high up,'2^ 
in interorbital space. Dorsal long, rather low, its first ray just behind 
the first ray of ventrals, midway between the snout and the middle of 
the base of the caudal fin. Caudal fin very long, the lobes about equal, 
longer than the head, widely forked, the accessory rays at is base very 
numerous and recurrent on the caudal peduncle ; about eight of these 
may be distinguished on each side of the fin. Anal fin rather large ; 
ventrals broad, reaching vent. Pectorals moderate, not reaching two- 
thirds of the distance to the ventrals. Scales quite small, somewhat 
imbedded in the skin, very loosely imbricated, or often scarcely imbri- 
cated at all, the exposed surfaces longer than high, profusely punc- 
tate; squamatiou quite irregular; the scales smaller on back and belly 
than on sides, most exposed on caudal peduncle. Lateral line much 
decurved. Coloration very dark, belly paler, but nearly all i^arts of the 
body studded with minute dark points. D. 10; A. 0; scales 20-85- 
IG. Teeth 4-5, hooked, somewhat club-shaped, with a broad mas- 
ticatory surface. Peritoneum black ; intestines much elongate, filled in 
this specimen with vegetable substance. L. 12 inches. Columbia Kiver 
and tributaries. 
(Agassiz, Amer. Joiirn. Sci. Arts, xix, 214, 1855 ; Giintlie.r, vii, 276; Jordan, Proc. U. 
S. Nat. Mus. i, 83, 1878.) 
'73.— OKTM©BOI\ Girard. 
(Girard, Proc. Acad. Nat. Sci. Pliila. 1856, 182: tyi )0 Crila microlepidota Ayres.) 
Body elongate. Jaws normal, the upper iirotractile, the lower sharp- 
edged, with a knob at the symphysis ; no barbel. Teeth G-G or G-5, 
