The Western Frog. Western Spotted Frog. 



Pacific Frog. 



Plate LXXIV. I, 3. Fe- 

 males (x|). 2. Male(x|). 4. 

 Male (xf). 



Rana pretiosa pretiosa 

 (Baird and Girard). 



Range: Northern Cali- 

 fornia to Southeastern Alaska, 

 and east to Montana and 

 western Wyoming. 



Habitat: Aquatic. In pools 

 and marshes along permanent 

 streams, in lakes or springs 

 of mountainous sections. 



Size: Adults, 2 4/5-3 4/5 

 inches. (Males, 45-75 mm. 

 Females, 46-95 mm.). (These 

 measurements are of R. p. 

 pretiosa and R. p. luteiventris). 

 We doubt if males and fe- 

 males under 50 mm. breed to 

 any great extent. 



General appearance: This is 

 a medium-sized frog, light or 

 dark brown with finely 

 roughened skin on the dorsal 

 parts; the back and top of 

 head have inky black spots, 

 which at times may be very 

 large and irregular. Occasion- 

 ally these dark spots have 

 light centers like the ones in 

 R. a. draytonii. There is a 

 light streak on the upper jaw. 

 It usually has a prominent 

 dorsolateral fold, but in 

 some even this disappears. 

 Sometimes the throat and 

 sometimes the entire under 

 parts are spotted. The under 

 parts are yellowish to salmon 

 red, clouded or marbled with 

 gray. The limbs have cross- 



182 



