STUDIES ON BIOLOGY OF FRESHWATER MUSSELS. 24! 



Headlee, T. J., and Simonton, J. 



'03 Ecological Notes on the Mussels of Winona Lake. Proc. Ind. Acad. 



Sci., pp. I73-I79- 

 Lohmann, H. 



'n Uber das Nannoplankton und die Zentrifugierung kleinster Wasser- 

 proben zur Gewinnung desselben in Lebenden Zustande. Int. Revue 

 ges. Hydrobiol., Bd. 4, pp. 138. 

 Nelson, T. C. 



'18 On the Origin, Nature, and Function of the Crystalline Style of Lamel- 

 libranchs. Jour. Morph., Vol. 31, pp. 53-111. Has an exhaustive 

 bibliography on the crystalline style. 

 Ortmann, A. E. 



'12 Notes upon the Families and Genera of the Najades. An. Carnegie 



Mus., Vol. 8, pp. 221365. 

 Petersen, C. G. J., and Boysen-Jensen, P. 



'n The Valuation of the Sea. Kept. Dan. Biol. Sta., Vol. 20. 

 Rice, T. B. 



'16 A Study of the Relations between Plant Growth and Combined Nitro- 

 gen in Winona Lake. Proc. Ind. Acad. Sci., pp. 333-362. 

 Riddle, 0. 



'09 The Rate of Digestion in Cold-blooded Vertebrates the Influence of 



Season and Temperature. Am. Jour. Physiol., Vol. 24, No. 5. 

 Simpson, C. T. 



'oo Synopsis of the Naiades, or Pearly Fresh-water Mussels. Proc. U. S. 



Nat. Mus., Vol. 22, pp. 501-1044. 

 Ward, H. B., and Whipple, G. C. 



'18 Freshwater Biology. New York, 1111 pp., and 1547 figs. 

 Zacharias, 0. 



'07 Planktonalgen als Molluskennahrung. Archiv f. Hydrobiologie u. 

 Planktonkunde, Bd. 2, pp. 358-361. 



