Bnfo fowleri Putnam in Missouri 



Fig. 1. Outline sketch of the head of an adult female Bufo ameri- 



canus from Norway, Maine. 

 Fig. 2. Side view of the same specimen. 

 Figs. 3 and 4. Similar views of an adult female Bufo fowleri from 



St. Louis, Missouri. 

 These figures are all drawn to the same scale (approximately 



XV2). 

 The specimens from which the sketches were made, together with 

 living specimens of both species, collected in the immediate vicinity, 

 were exhibited at a meeting of the Academy on May 7, 1921. 



Bony crests. — In B. fowleri the frontal crests are 

 rather small and cither slightly divergent behind or, 

 more often, parallel, and even fused in the mid-line 

 (Dickerson, Deckert^-). In B. americanus the crests are 

 more robust and often parallel, but not fused. In both 

 species there is almost always a short medially or pos- 

 teriorly directed prolongation of this crest beyond its 

 union with the post ocular ridge which runs in a trans- 



12. Deckert, Richard: Do the Fowler's Toad and the American Toad 

 Interbreed? Science. N. S. vol. XLV. pp. 113-114, 1917. 



