140 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. V. 



modification of the anal fin in any of these young, as found in the adult 

 male. This modification of the anal fin is probably found with the 

 development of the sexual organs. The young are born the last of May. 



130. Goodea atripinnis Jordan. 



Goodea atripinnis Jordan, Proc. U. S. Nat. Mus., 1879, 299; Leon, 

 Guanajuato: Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 

 1896, 685.' 



Xenendum caliente Jordan & Snyder, Bull. U. S. Fish Comm., 

 1900, 127, fig. 8; Rio Verde, Aguas Calientes: Jordan & Ever- 

 mann, Bull. 47, U. S. Nat. Mus., 1900, 3152. 



Goodea calientis Meek, Field Col. Mus. Pub. 65, 1902, 100; Aguas 

 Calientes; Lagos; Celaya; Acambaro; Huingo; San Juan del Rio. 



Basin of the Rio Lerma, and of the Rio San Juan, a tributary of 

 the Rio Panuco on the Mexican plateau. 



FIG. 43. GOODEA ATRIPINNIS Jordan. 



No. 6147 (Xenendum caliente }. & S.), Leland Stanford Jr. University. 



Head 3^ to 4; depth 2^ to 3 ; D. 13; A. 14; scales 13 or 14-35 to 3^. 

 Body rather robust, much compressed posteriorly; interorbital space 

 slightly convex, i^ in head; snout 4 in head; eye 3 ^ to 4 in head; 

 origin of dorsal fin midway between tip of caudal and nape; distance 

 from base of caudal to origin of dorsal 2 in distance from the latter 

 point to tip of snout ; origin of dorsal slightly behind that of anal fin ; 

 fins rather large ; pectorals i y in head ; ventrals 2 in head ; the caudal 

 fin slightly rounded at tip; caudal peduncle deep, much compressed, 

 its least depth if in head. 



Color dark olive brown, lighter below, each scale with a dark 

 angular band, giving the fish a somewhat speckled appearance; the 

 young are slightly mottled in color; fins all plain; color of the sexes 

 practically alike. Length about 4 inches. 



One female 3.50 inches in length contained 44 young, each .53 inch 

 in length. The young are born during the last half of May. 



