80 THE CYPRINODONTS. 
Mexico, and the Pacific coast of Central America. Largest eight and a half 
inches in length. Reaching a length of ten inches or more. 
GAMBUSIIN A. 
BELONESOX. 
Belonesoe Kner, 1860, Sb. Ak. Wien, XL, 419; Blkr., 1863, Atl. Ichth., ITI, 140; Gthr., 1866, Cat., 
VI, 333. 
Belonesocini Blkr., 1863, Atl., III, 140. 
Elongate, compressed; head long, pointed; caudal region moderately 
deep. Snout long, pointed; both jaws produced, lower longer. Mouth 
wide, much developed laterally. Teeth numerous, simple, in cardiform 
bands. Intermaxillaries not anchylosed, but together forming an elongate 
triangular plate. Mandibles elongate. Scales medium. Anal modified in 
the male. Dorsal and anal behind the middle of the body, the former 
originating farther backward. Intestine short. 
Central America to Mexico. 
Belonesox belizanus. 
Belonesox belizanus Kner, 1860, Sb. Ak. Wien, XL, 419, with plate; Blkr., 1863, Atl. Ichth., ITI, 140; 
Gthr., 1866, Cat., VI, 333; Jor., 1887, P. U. S. Mus., IX, 564; Eig., 1893, P. U. S. Mus., XVI, 57. 
B.6; D.9; A. 10-11; V.6; LI. 56-63; Ltr. 18. 
Head one third or more and depth of body one fifth or less of the length 
to the caudal. Upper surface of intermaxillary plate as long as postorbital 
part of head. Base of dorsal in females equals half its distance from the 
caudal, in males more than half. Anal process of male two thirds as long 
as head, composed of three rays. Base of dorsal farther back than that of 
anal. Caudal broad, hind margin convex. 
Brownish olive above ; flanks with black dots in longitudinal series; a 
black spot on the middle of the base of the caudal. 
Honduras ; Guatemala; Mexico. (Giinther.) 
PSEUDOXIPHOPHORUS. 
Pseudoxiphophorus Blk., 1860, Cypr., 482, — 1868, Atl. Ichth., III, 140; Gth., 1866, Cat., VI, 332. 
Peciliodes Steind., 1863, Sb. Ak. Wien, XLVIII, 176. 
Shaped like Gambusia. Body compressed, caudal pedicel steep; head 
depressed, crown flat. Snout broad, blunt ; chin steep. Mouth large, wide ; 
