March, 1914.] The Food of Rana Pipiens Shreber. 



261 



Since the greater number of stomachs contained no sand, and 

 since, as a rule, sand was found only in stomachs containing 

 ground animals, I am inclined to think that its ingestion was 

 merely incidental. 



LOT W 



J This stomach contained sand only. 



Collected Aug. 15, 1913, between 10:30 a. m. and 1:00 p. m. 



Animal Matter. The frog's food consists of mollusks, 

 crustaceans, myriapods, spiders, and insects; in fact any sort of 

 living creature is acceptable to it as both sense of taste and of smell 

 are apparently obtuse. In a few stomachs, a small amount of 



