California Yellow-1 



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f » 



egged Frog. Thick- 

 skinned Frog. Boyle's 

 Frog. 



Plate LXI. I. Male (xf). 

 2, 3. Females (xf). 



Rana boy In boy Hi (Baird). 



Range: Western Oregon, 

 northern and central portions 

 of California, chiefly west of 

 the high Sierra Nevada. 



Habitat: "Life-zones, upper 

 mmmm Sonoran and Transition. In- 

 habits margins of springs, 

 streams, and fresh-water 

 lakes." (Grinnell-Camp, 1917, 

 p. 146). 



Size: Adults, 1 3/5-3 inch- 

 es. (Males, 39-67 mm. Fe- 

 males, 40-75 mm.). Small- 

 est of the three subspecies of 

 Rana boylii. 



General appearance: This is 

 a small frog with stout, 

 broad body. The skin on the 

 back, legs, and tympanum is 

 thick and rough with small 

 brownish papillae. The color 

 of the back is black, light 

 gray, greenish or brownish 

 with indistinct dark mottling. 

 There is a patch of lighter 

 color on top of the head with 

 a darker area behind crossing 

 the upper eyelids. The tym- 

 panic region is darker than 

 the head. Red is never present 

 in the coloration. The venter 

 is white with pale yellow on 

 the posterior part and on the 

 hind legs. The throat and 

 sides of the body are mottled 

 with blackish. 



Structure: Head broad and 

 pointed; web of foot large 



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