86 HAPLOMI. 
1. Zoogoneticus cuitzeoensis. 
Platypecilus quitzeoensis, B. A. Bean, Proc. U.S. Nat. Mus. 1898, p. 540, fig. 1°. 
Zoogoneticus cuitzeoensis, Meek, Publ. Columbian Mus., Zool. v. 1904, p. 111, fig. 29 ?. 
Depth of body 24 to 32 in the length, length of head 33-37. Snout as long as or shorter than the eye, the 
diameter of which is 3 to 3} in the length of head; interorbital width 22 to 3 in the length of head. 
Lower jaw projecting. 28 to 30 scales in a longitudinal series. Dorsal 13-16; origin equidistant 
from eye or operculum and base of caudal. Anal 13-15; origin a little behind that of the dorsal. 
Pectoral $ to 2 the length of head. Caudal rounded. Males nearly uniformly coloured, with the 
vertical fins dusky, the dorsal and anal with pale edges. Females with a series of dark spots or bars on 
the lower half of the posterior part of the body; a pair of dark spots at the base of the caudal ; fins 
pale, immaculate. 
Hab. Muxico, Rio Lerma System : 
Lake Chapala?; Lake Cuitzeo 1. 
Here described from specimens from Lake Chapala (Meek), measuring up to 65 mm. 
in total length. 
2. Zoogoneticus dugesii. 
Fundulus dugesii, Bean, Proc. U.S. Nat. Mus. 1887, p. 3738, t. 20. fig. 5°. 
Adinia dugesti, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 661”. 
Zoogoneticus dugesiit, Meek, Publ. Columbian Mus., Zool. v. 1904, p. 111, fig. 80°. 
Hab. Mexico, Rio Lerma System : 
Lagos?; Guanajuato!; Lake Patzcuaro 3. 
This species should be easily distinguished by the coloration, the body being 
crossed by well-defined vertical bars, and by the short and deep caudal peduncle. 
8. Zoogoneticus diazi. 
Zoogoneticus diazi, Meek, Publ. Columbian Mus., Zool. v. 1904, p. 114, fig. 32°. 
Zoogoneticus miniatus, Meek, t. c. p. 115, fig. 33”. 
Depth of body 3-34 in the length, length of head 34 to 3%. Snout nearly as long as or shorter than eye, 
the diameter of which is 2? to 32 in the length of head; interorbital width 22 to 3 in the length of 
head. Lower jaw a little projecting. 32 to 34 scales in a longitudinal series. Dorsal 16-18 ; origin 
equidistant from head and base of caudal ( ¢) or a little nearer the former (3), Anal 12-15; origin 
below or a little behind that of the dorsal. Pectoral 2 the length of head. Caudal subtruncate. 
A lateral series of irregular dark spots or vertical bars ; fins immaculate. 
Hab. Mexico, Rio Lerma System and Valley of Mexico: 
Lake Patzcuaro!; Lake Zirahuen!; Lake Chalco ?. 
Here described from specimens from Lake Patzcuaro (Meek) measuring up to 
80 mm. in total length. 
4. Zoogoneticus robustus. 
Fundulus robustus, Bean, Proc. U.S. Nat. Mus. 1892, p. 285, t. 44. fig. 2°; Jord. & Everm. Bull. 
U.S. Nat. Mus. xlvii. 1896, p. 644’. 
