86 HAPLOMI. 



1. Zoogoneticus cuitzeoensis, 



Platypmcilus qaitzeoensis, B. A. Bean, Proc. U.S. Nat. Miis. 1898, p. .540, fig. 1 \ 

 Zoogoneticus cnit-eoensis, Meek, Pul)l. Columbiau ]\Ius., Zool. v. 1904, p. Ill, fig'. 29 ". 



Depth of body 2} to 3^- in the length, length of head 3]-3|. Snout as long as or shorter than the eye, the 

 diameter of which is 3 to Si in the length of head ; interorbital width 2|- to 3 in the length of head. 

 Lower jaw projecting. 2S to 30 scales in a longitudinal series. Dorsal 13-10 ; origin equidistant 

 from eye or operculum and base of caudal. Anal 13-15 ; origin a little behind that of the dorsal. 

 Pectoral g to | the length of head. Caudal ronnded. 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. 



Ilal). Mexico, Eio Lcrma System : 



Lake Cliapala-; Lake Cuitzco i. 



Here described from specimens from Lake Chapala [Meek), measuring up to 65 mm. 

 in total length. 



2. Zoogoneticus dugesii. 



Fumluhis diKji'Sii, Bean, Proc. U.S. Nat. JNIus. 1887, p. 373, t. 20. fig. 5\ 

 Adinia dugesii, Jord. & Everm. Bull. U.S. Nat. ]\Ius. xlvii. 1896, p. 6G1 '. 

 Zoogoneticus dugesii, ]\Icek, Publ. Colunjbian ]\Ius., Zool. v. 190-1, p. Ill, fig. 30 \ 



Ilah. MEXfco, Rio Lerma System : 



Lagos ^ ; Guanajuato ^ ; Lake Patzcuar 



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. 



3. Zoogoneticus diazi. 



Zoogoneticus diazi, Meek, Pub). Columbian Mus., Zool. v. 1901-, p. 114, fig. 32'. 

 Zoogoneticus miniatus, ]\Icek, t. e. p. 115, fig. 33 ^ 



Depth of body 3-3i in the length, length of head 31- to 3|. iSnout nearly as long as or shorter than eye, 

 the diameter of which is 2^ to 3|- in the length of head ; interorbital width 2--j 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 ( 5 ) or a little nearer the former ( cJ ). Anal 12-15 ; origin 

 below or a little behind that of the dorsal. Pectoral 'i the length of head. Caudal subtruncate. 

 A lateral series of irregular dark spots or vertical bars ; fins immaculate. 



Ilah. Mexico, Eio Lerma System and Valley of Mexico : 



Lake Patzcuaro ^ ; Lake Zirahuen ^ ; Lake Chalco ". 



Here described from specimens from Lake Patzcuaro (Meelc) measuring up to 

 80 mm. in total length. 



4. Zoogoneticus robustus. 



Fundidus roljustus, Beau, Proc. U.S. Nat. Mus. 1892, p. 285, t. 44. fig. 2 ' ; Jord. & Everra. Bull. 

 U.S. Nat. Mus. xlvii. 189G, p. C14'. 



