98 HAPLOMI. 
Hab. Mexico, Mountain Lakes and Streams of Central Vera Cruz: 
Lake Alcohuaca, near Huamantla, 8000 feet } (Jones); Orizaba*®® (Woolman, 
Gadow). 
Of the numerous examples, measuring up to 85 mm. in total length, which I have 
examined, the majority have 12 dorsal rays, in striking contrast to G. bimaculata, in 
which the usual number is 14 or 15. 
11. Gambusia bimaculata. (Tab XIV. fig. 4.) 
Xiphophorus bimaculatus, Heck. Sitzungsb. Ak. Wien, i. 1848, p. 296, t. 9. figs. 1-2'. 
Pecilioides bimaculatus, Steind. Sitzungsb. Ak. Wien, xlvili. 1868, p. 176, t. 4. fig. 2°. 
Pseudoxiphophorus reticulatus, Trosch. in Miiller’s Reise Mexico, ii. Append. p. 104 (1865) *; Giinth. 
Cat. Fish. vi. p. 338 (1866) *; Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 678°. 
Pseudoxiphophorus bimaculatus, Trosch. |. c.°; Ginth. t. c. p. 3327; Garm. Mem. Mus. Comp. 
Zool. xix. 1895, p. 81°; Meek, Publ. Columbian Mus., Zool. v. 1904, p. 127°. 
Pseudoxiphophorus bimaculatus, var. teniatus, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 362”. 
Depth of body 3 to 4 in the length, length of head 33 to 4. Snout as long as or a little shorter than eye, the 
diameter of which is 3 to 32 in the length of head. Interorbital width equal to the distance from middle 
or posterior part of eye to free edge of operculum, 28-31 scales ina longitudinal series. Dorsal 13-17 ; 
origin about equidistant from tip of snout and base of caudal. Anal 9-11, below the anterior dorsal rays, 
pointed, the longest ray from 2 to as long as the head. Pectoral 2 to 4 the length of head. Caudal ~ 
rounded. Least depth of caudal peduncle 2 to 3 the length of head. Olivaceous or brownish; some or 
all of the scales with dark outlines ; a dark spot above the pectoral, another on the upper part of the base 
of caudal; dorsal with series of small dark spots; anal and caudal dusky. 
Hab. Sovrnern Mexico, Tepeaca, San Domingo de Guzman!? (Buller), Jalapa®, 
Xico ®, Orizaba15, Cordova (Boucard), Motzorongo®, El Hule®, Obispo %, 
Perez®, Sanborn®, Rio Tonto (Gadow); British Honpuras, Stann Creek 
(Robertson); GuatEMALA (Godman). 
A very variable species in form, coloration, and number of fin-rays. Specimens 
from San Domingo de Guzman (var. teniatus) have 16 or 17 dorsal rays and the dark 
edges of the mid-lateral series of scales so broad as to form a dark longitudinal band ; 
one of these is figured (Tab. XIV. fig. 4). Examples from other localities appear 
also to have peculiarities which may prove to be distinctive. The numerous specimens 
examined measure up to 90 mm. in total length. 
11. GLARIDICHTHYS, Garman, 1896. 
Glaridichthys, Garman, Am, Nat. xxx. 1896, p. 282. 
Viviparous, Anal fin, in the male, advanced and modified into a long intromittent organ. Mouth small or 
moderate; rami of lower jaw firmly united; small teeth in bands, with an outer series of enlarged, 
chisel-shaped, fixed teeth. Dorsal fin short, with 8 to 11 rays. 
This genus comprises three species, respectively from Northern Mexico, Cuba, and 
Brazil. 
