U. S. B. F.— Doc. 



Plate IV. 



FIG. I.^SPADEFOOT iSCAPHIOPUS HOLBPnoKII). POSSIBLE SPECIES; 

 NATURAL SIZE. 

 (After Overton. Mus. Brooklyn Inst. Arts and Sci. Sci. Bull.. Vol. 2, No. 3.) 



FIG. 2.— COMMON TOAD (BUFO AMERICANUS). 

 POSSIBLE SPECIES; NATURAL SIZE. 



FIG. 3.— WOOD FROG (RANA SYLVATICA). 

 POSSIBLE SPECIES; NATURAL SIZE. 



