36 THE CYPRINODONTS. 
Characodon lateralis. 
Plate I. Fig. 9, teeth. 
Characodon lateralis Gthr., 1866, Cat., VI, 308, —1868, Tr. Zool. Soc., VI, 480, pl. 82, fig. 2; Hig., 
1893, P. U. S. Mus., XVI, 56. 
Characodon bilineatus Bean, 1888, P. U. S. Mus., X, 371, pl. 20, fig. 2; Hig., 1893, 1. c., 56. 
Characodon variatus Bean, 1888, 1. c., 370, pl. 20, fig. 1, — 1892, P. U. S. Mus., XV, 286; Hig., 
l.c., 56; Woolm., 1894, B. U. S. F. Com., 62. 
Characodon ferrugineus Bean, 1888, P. U. 8. Mus., X, 372, pl. 20, fig. 3, 4; Hig., 1. c., 56. 
B..4; D. 12; A. 12; V.6; P. 11, G32 hie I-12 Veritas: 
Body compressed, moderately stout, caudal pedicel deep, back gently 
arched. Head about one third of length to base of caudal; very little 
arched transversely. Snout short, not as long as the eye; chin steep. 
Mouth medium; upper jaw protractile. Teeth in outer series bicuspid. 
Eye large, nearly equal to interorbital space, one third longer than snout, 
two sevenths of head. The specimen examined had four branchiostegal rays 
on each side, whether this is normal must be decided from others. Fins 
small; dorsal origin about five sevenths of the distance from snout to caudal ; 
anal opposed to dorsal ; posterior margin of caudal subtruncate. 
Olive to reddish brown, with scattered small spots of darker on the back, 
a darker band with or without spots of dark along the flank, more distinct 
posteriorly. Fins with fine dots of dark color. 
Originally discovered in Central America; here described from Parras, 
Coahuila, Mexico. 
Characodon furcidens. 
Characodon furcidens J. & G., 1883, P. U. S. Mus., V, 354, 371; Jor., 1886, P. U.S. Mus., VIII, 368, 
— 1887, Rep. U.S. F. Comm., 836; Hig., 1893, P. U.S. Mus., XVI, 56. 
D. 15-17; A.13; Li ca. 505 Ltr: 16: 
Comparatively elongate, not greatly compressed. Head rather low, 
broad, depressed. Caudal peduncle somewhat long and slender, about 
length of head. Anterior teeth larger, bicuspid. Eye three tenths of 
head. Interorbital space nearly half of head. Origin of dorsal midway 
from base of pectoral to caudal; fin low, not as high as long; base three 
fifths of the length of the head. Anal originating below seventh dorsal ray. 
Pectorals three fifths, and ventrals one half as long as the head. Caudal 
subtruncate, upper lobe a little the longer. 
Males mottled with darker on the flanks, or plain. Vertical fins each 
with several bars of brownish, and a dusky subterminal bar. A narrow 
streak of dark along the middle of each scale on the back. Females with 
