Bufo fowleri Putnam in Missouri 



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



canui from Norway, Maine. 

 Fig. 2. Side view of the same specimen. 

 Figs. 3 and 4. Similar views of an adult female Bufo fOM>leri from 



St. Louis, Missouri. 

 These flgures are all drawn to the same scale (approximately 



X%). 

 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 either 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 Fow^ler's Toad and the American Toad 

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



