9 
bo 
6 SCIENCE. [N. S. Von. X. No. 260. 
the non-migratory vertebrates in some unit Here large numbers of all the non-migra- 
of environment. The station was to be tory vertebrates were to be collected, their 
ES RO ra oa 
Fic. 1. The Biological Station During its First Year at Turkey Lake. 
located on a lake which would present well characteristics tabulated and compared 
circumscribed boundaries within which the with similar series from other lakes. We 
Fic. 2. The Station During Succeeding Years at Turkey Lake. 
conditions were supposed to be nearly uni- were, in short, to conduct a statistical in- 
form at any time and from season toseason. quiry into evolution. 
