NATURAL HISTORY OF BHOMPSTON POND. 231 



When thus considering these problems of life in this most 

 interesting and productive pond, one is particularly impressed 

 by Tennyson's words : 



" Come forth into the light of things, 

 Let Nature be your teacher." 



The writer wishes to express his indebtedness to Mr. Cecil 

 Warburton (Cambridge University) and to Mr. N. D. F. 

 Pearce (Cambridge University) for the identification of Alona 

 quadrangularis, Simocephalus vetulus, and Amphistomum 

 subclavatum ; also to Mr. C. J. Gahan (Natural History 

 Museum, South Kensington) for the identification of 

 Ilybius ater. 



