262 CALIFORNIA ACADEMY OF SCIENCES. 



Several specimens, which are doubtless immature males, 

 resemble the females, except in having the anterior rays 

 of the anal somewhat elongate, but not yet developed into 

 a true anal process. Anal basis short, four times in lower 

 side of caudal peduncle. 



Color, in alcohol, a dark lateral band usually present 

 on posterior half of body, with a distinct black line 

 through its middle. A black line present on lower side 

 of caudal peduncle. Scales edged with dark. Females 

 otherwise very light, the fins unmarked. Adult males 

 very dark, all fins with dark shadings; young males re- 

 sembling' the females in color. 



Of the thirty -three specimens collected by Dr. Eisen, 

 three are adult males and five or six others seem to be 

 immature males. The largest male is 1 inch, the largest 

 female 1% inches. The largest collected by Mr. Price 

 are, male 1% inches, and female 2^ inches. 



Mr. Price also fished Sabino Canon, a tributary of the 

 Santa Cruz, of the Gila Basin, obtaining Leuciscus inter- 

 medins and Pcecilia occidentalis ; and from the Rio San 

 Pedro at Fairbank, Arizona, also in the Gila Basin, he 

 obtained Pantosteus clarki and Agosia chrysogaster. I 

 have the following note on 



Leuciscus intermedins (Girard) : 



Head 3^3 to 3^ , depth 4 in length ; eye equal to snout, 

 1 to ij( in interorbital, 3% to 4 in head. Teeth nor- 

 mally 2, 5-4, 2, but 1, 5-4, 1 and o, 5-4, 1 and o, 4-4, o 

 also found, the tips black in some specimens. Dorsal 8 

 or 9, anal 7 or 8 ; scales 17 to 20 — 64 to 73 — 7 to 9> lat- 

 eral line much decurved. Anal fin deep, longest ray 

 twice length of base. 



