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



263 



partially digested animal matter was present that could not be 

 placed in its proper phylum and I will make no further reference 

 to it. 



Acknowledgment. I wish to express here briefly, my 

 sincere appreciation to those who have very kindly assisted me in 

 the determination, as follows: Prof. W. M. Barrows and Mr. 

 W. J. Kostir of OhJo State University, the spiders and the Orthop- 

 tera; Prof. Stephen R. Williams of Miami University, the Myria- 

 poda; Mr. Chas. Dury, the Rynchophora; and to Doctors Harriet 

 Richardson, A. K. Fisher, and J. C. Crawford of the National 

 Museum, Washington, D. C, the Isopoda, the Lepidopterous 

 larvae, and the Hymenoptera. 



X This stomach contained sand only. 



Collected Aug. 18, 1913, between 10:00 a. m. and 1:00 p. m. 



MOLLUSCA 29 



Gastropods furnished three per cent of the entire number 

 of animals and were found in ten per cent of the stomachs 

 examined. In a few stomachs, the digestive fluids had dis- 

 solved the shell beyond recognition. The species that could 

 be identified were: 



Limacidce 3 



Zonitoides arboreus Say 3 



Strepomatidce 5 



Goniobasis informis Lea 5 



Limneaidce 11 



Galba humilis modicella Lea 4 



Physa heterostropha Say 7 



Gastropoda, not further identifiable 10 



