1 76 J. H. HEWITT. 



cultures of Plenrotricha with which the work was performed. To 

 each of these men I desire to express my sincere appreciation. 



REFERENCES. 



1. Lewin. 



'n Royal Soc. Bulletin, Vol. 84, p. 333. 



2. Calkins. 



Protozoology, New York and Philadelphia, p. 112. 



