216 



t)avis, W. M. The classification of lakes. Supplement in Russell, 1895. 



Bvermann, B. W. The investigation of Eivers and Lakes with Eeference to 

 the Fish Environment. Bull. U. S. Fish. Coram., 69-73, 1893. 



Forbes, S. A. Biennial Report Illinois State Laboratory, 1893-94. 



Forel F. A. Algemeine Biologie eines Siisswassersees, in Zacharias die Thier 

 und Pflanzenwelt des Siisswassers. Leipzig, 1891. 



Forel, F. A. Le Leman, Tome premier, 1892; Tome second, 1895. Lau- 

 sanne. 



Le Conte, John. Physical studies of Lake Tahoe. Overland Monthly, 1883, 



1884. 



Levrtte, G. M. Observations on the depth and temperature of some of the 

 lakes of Northern Indiana. Geological Survey of Indiana, 1875. 



Reighard, J. E. A biological examination of Lake St. Claire. Bull. Mich. 

 Fish Comm. 



Rusxel, I. G. Lakes of North America. Ginn & Co., Boston, 1895. 



.SWiV/o, .1. Hydrobiologische Untersuchungen I. Schrifte der naturf., Ges. 



Danzig, N. F. Bd. VII, 1143-89, 1890. 



Ton-, Ralph S. Lake Cayuga a rock basin. Geol. Soc. Am., Bull., Vol. 5, 

 1894, pp. 339-356. 



Whipple, G. G Some observations of the temperature of surface waters, 

 and the effect of temperature on the growth of micro-organisms. J. New Engl. 

 Water Works Assoc. IX, No. 4. 



A PRELIMINARY REPORT ON THE PHYSICAL FEATURES OP TURKEY LAKE. By 

 D. C. RlDGLEY'."" 



ACKNOWLEDGMENTS. 



Most of the data on which this preliminary report is based were collected 

 during the summer of 1895 at the Indiana University Biological Station at Vawter 

 Park, Kosciusko County, Indiana, under the direction of Dr. Carl H. Eigenmann. 

 I wish to acknowledge the aid of his valuable suggestions, both in the collection 

 of the data and the preparation of the report. I wish to acknowledge also the 



* Contributions from the Zoological Laboratory of the Indiana University, No. 15a. 



