PLATE 18 
Rana catesbeiana 
Pig. 53. Adult male, from near El Verano, Sonoma County, photographed 
July 12, 1922. About % 6 natural size. 3917. 
Fig. 54. Second-year tadpole. About % natural size. 
Figs. 55—56. Adult female from near Riverside, -'Riverside County, photo- 
graphed August 1, 1922. About %6 natural size. 3923, 3924. 
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