94 Field Columbian Museum — Zoology, Vol. III. 



Viviparous; One female 3 inches in length contained 2(S young, 

 each about .60 inch in length; another female 3.15 inches in 

 length contained 47 young, each .43 inch in length; egg all 

 absorbed. Specimens collected May ig to 24. Spavv^ning sea- 

 son about the last of May or early in June. Named for Porfirio 

 Diaz, President of the Republic of Mexico. Patzcuaro; Zir- 

 ahuen. 



Zoogoneticus miniatus, sp. nov. 



Type, No. 3680, F. C. M. Length, 1.60 inches. 



Locality, Lago de Chalco, near Chalco, Mexico, Mexico. 



Head 3i: depth 3^; D. 17;. A. 14; scales 32-14. Body 

 elongate, compressed; mouth *rather large, very protractile, 

 lower jaw slightly the longer; teeth conical, very large, in a band; 

 eye 2|; snout 4^; interorbitals 3; pectorals short and broad, 

 i| in head; ventrals 3; origin of dorsal fin midway between base 

 of caudal and middle of preopercle, and slightly in advance of 

 origin of anal. 



Intestinal canal short, about as long as body; anal fin modi- 

 fied, the first 7 rays short, the other 7 long, and the two groups 

 of rays separated by a shallow notch. 



Olivaceous, much mottled with darker. No distinct lateral 

 band. The last blotch forms an indistinct black caudal spot. In 

 general color and form this fish very closely resembles Skiffia 

 varii'gata. Largest specimen (Type) 1.60 inches long. 



Total number of specimens 5, in rather poor condition. 

 Chalco. 



This genus includes the following species: 



Zoogoneticus quitzeocnsis (B. A. Bean). Lago de Quitzeo; 

 La Barca; Ocotlan. 



Zoogoneticus dugesii [Yie^.xi). Guanajuato; Lagos; Patzcuaro. 



Zoogoneticus robustus (Bean). Guanajuato; Ocotlan; Patz- 

 cuaro; Zirahuen. 



Zoogoneticus guatemalensis (Gunther). Lake of Duenas; 

 Lake Amatitlan; Rio Guacalate, Western Ecuador. 



Zoogoneticus pac]iycephalus (Gunther). Lake Atitlan. 



Zoogoneticus labialis (Gunther). Rio San Geronimo; Guate- 

 mala; Yzabal. 



Zoogoneticus diazi Meek. Patzcuaro; Zirahuen. 



Zoogoneticus miniatus Meek. Chalco. 



