232 NORTH AMERICAN FAUNA. [Mo.7, 



Salnio mykiss agua-bonita Jordan. 



Type locality. — Whitney Creek south of Mt. Whitney, Higli Sierra, California. 

 (Jordan, Report State Fish Commissioners of California, 18IJ2, p. 62.) 



Several specimens of this, the 'Golden Trout' of Kern River, were 

 collected iu Whitney Creek, whence came the original types, and from 

 Cottonwood Creek, a tributary of Owens Lake, to which they have 

 been transplanted. Two specimens were also preserved, taken from 

 the South Fork of Kern River. They agree perfectly with the original 

 description cited. The scale formula' should read 180 to 200, not 130 

 to 200, as in the original description. 



Cyprinodon macularius Girard. 



Type locality. — Rio San Pedro, Arizona. 



{Cyprinodon nevadensis Eigenmann, Proc. Cal'a Acad. Nat. Sci., 1889, 270.) 



This small Cyprinodont inhabits the springs and wells throughout 

 the desert region of southern California, Arizona and Nevada, and 

 is the characteristic denizen of the more or less alkaline waters of this 

 district. The original types are from the Rio San Pedro, a tributary 

 of the Rio Gila, and I have found it abundant at a pond at Lerdo, 

 Mexico, on the lower Colorado River. Specimens obtained at Lerdo 

 have been compared with those from Death Valley and found identical. 



The species varies in form and color, and apparently in the size 

 which, it reaches in different localities. The males have the back and 

 sides uniform dusky, the lower parts lighter, all the fins in the most 

 brightly colored individuals being broadly margined with black. The 

 females have the lower half of sides as well as belly lighter, often sil- 

 very white, the sides crossed by black bars, which are wide along 

 middle of body, but become much narrower than the interspaces on 

 the lower half of sides. The bars vary in number and size and often 

 alternate with narrower, fainter, and shorter ones. The fins are light, 

 and the dorsal either with or without a black blotch on its posterior 

 rays. Although usually uniform in coloration, the males occasionally 

 show lateral bars, which, however, contrast little with the general 

 dusky color of the sides. 



The dorsal varies from 9 to 11, and the anal from 10 to 11. There 

 are 24 or 25 transverse series of scales, and the humeral scale is but 

 little enlarged. The head is contained 3 to 3^ times in the length. 

 Adults are very short and deep, the depth being nearly or quite half 

 the length; in half- grown specimens 1 inch long, the depth is contained 

 2| in the length. The eye is very small, about equaling the snout, 

 contained 1£ to If times in the interorbital width, and 3| times in the 

 head. The front of dorsal is usually midway between occiput and base 

 of caudal. 



The normal number of ventral rays in this species seems to be six. 

 No specimen examined has shown more than this number, and in sev- 

 eral but five are present. In one specimen from Ash Meadows, Nevada, 

 the ventral of one side only is present, and contains but three or four 



