PCECILIA. 103 
Pecilia butleri, Jord. Proc. U.S. Nat. Mus. 1888, p. 330°; Jord. & Everm. t. ec. p. 691°"; Meek, 
t.c. p. 151”. 
Pecilia limantouri, Jord. & Snyd. Bull. U.S. Fish. Comm. 1900, p. 129, fig. 10%; Jord. & Everm. 
t. c. p. 3153 (1900). 
Platypecilus nelsoni, Meek, t. c. p. 147, fig. 46%. 
Pecilia latipunctata, Meek, t. c. p. 151, fig. 48 . 
Depth of body 23 to 34 in the length, length of head 33 (young) to 43. Snout as long as or shorter than 
eye, the diameter of which is 3 (young) 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. 26 to 29 scales in a longitudinal 
series. Dorsal 8-11; origin equidistant from tip of snout and middle or posterior part of caudal (2); 
free edge of the fin more or less convex, the rays usually increasing in length to the middle ones and 
rapidly decreasing posteriorly. Anal 8-10, acutely pointed; origin below or a little behind that of the 
dorsal (2). Pectoral as long as or a little shorter than head. Caudal rounded or subtruncate. Least 
depth of caudal peduncle from § (@ ) to as long as the head (¢). Olivaceous, edges of scales sometimes 
darker ; sides often with narrow dark vertical bars, especially in males; series of dark spots, one on 
each scale of the side of the body, often present, especially in females; dorsal and caudal sometimes 
blackish, with or without pale margins, sometimes pale, usually with several series of small dark spots, 
which may be absent in females. 
Hab. Mexico and Central America, extending to Colombia and the Leeward Islands: 
Mexico, Rio San Juan in Nuevo Leon®, Rio Conchos®, Rio Soto Marina® and 
Rio Forlon ® 7° 32 in Tamaulipas, Rio Presidio *° °° in Sinaloa (Morrer), Los Menores 
in Jalisco (Buller), Rio Verde® in San Luis Potosi, Vera Cruz!?°, Boca del 
Rio® and Rio Papaloapam® in Vera Cruz, Orizaba®, Puebla (Boucard), Rio 
Balsas in Guerrero ° 3!, Tehuantepec °, Tequesixtlan (Gadow), and San Gerénimo ® 
in Oaxaca, La Esperanza in Chiapas®; GuaremMata, Rio Chisoy!%, Chiapam, 
Huamuchal, and Lakes Duefas, Nacasil, and Amatitlan (Salvin); Nicaraaua, 
Lake Nicaragua © (Dow); Costa Rica, San José (Biolley) ; Panama!’, Panama ?°, 
Colon 2°, and Rio Chagres 1°,—CoLomsia ; Curacgoa!?; AruBa #4, 
I have examined a large series of specimens, representing the whole range of the 
species, measuring up to 100 mm. in total length, including the types of P. chisoyensis 
and P. dovii and examples of P. butlert, P. limantouri, and P. latipunctata received 
from their describers. Of the last-named I have compared one specimen, from Forlon, 
received from Dr. Meek, with several from the same locality determined by him 
as Pecilia sphenops. The lateral series of spots supposed to be characteristic of 
P. latipunctata is merely a phase of the peculiar and usually irregular blackish 
_ markings which are found on individual specimens of so many Cyprinodont species. 
The specimens figured on Tab, XIII. are :— 
One of the types of P. latipunctata, from Forlon. 
. A female from San José, Costa Rica. 
A spotted variety from Tequesixtlan. 
A female from Puente de Ixtla. 
A male from Vera Cruz (typical P. sphenops). 
. A male from Puebla. 
A female from Lake Amatitlan (typical P. mexicana). 
ND OB wo 
