203 

 FIRST REPORT OF THE BIOLOGICAL STATION. 



Contents. — Directors' First Eeport of Biological Station. 

 Introductory. 

 Acknowledgments. 

 Equipment. 

 Plankton ret. 

 Sounding apparatus. 

 Additional equipment. 

 Plan of work. 



Part I. — Turkey Lake as a Unit of Environment. 



Introductory. 



Orientation. 



General features. 



Size. 



Relation of water to outflow and evaporation. 



Constancy of Turkey Lake as a unit of environment. 



A Preliminary Eeport on the Physical Features of Turkey Lake — D. C. 

 Eidgley. 



Hydrographic map of Turkey Lake — C. Juday. 



Temperature of Turkey Lake — J. P. Dolan. 

 Part II. — The Inhabitants of Turkey Lake. 



Note on Plankton — C. H. Eigenmann. 



General Fauna — C. H. Eigenmann. 



Leeches— Mrs. B. C. Eidgley. 



Rotifera— D. S. Kellicott. 



Cladocera — E. A. Birge. 



Decapoda — W. P. Hay. 



Mollusca-R. E. Call. 



Fishes — C. H. Eigenmann. 



Batrachia — C. Atkinson. 



Snakes — G. Eeddick. 



Turtles— C. H. Eigenmann. 



Water Birds — F. M. Chamberlain. 

 Part III.— Variation. 



The study of Variation— C. H. Eigenmann. 



Variation of Etheostoma caprodes — W. J. Moenkhaas. 



