114 The Ohio Journal of Science [Vol. XX, No. 4,. 



Chilodon megalotrochae Stokes. 



This species was abundant in one collection of algae from 

 Station E, taken on January 7. 



Length 32/x. 



Chilodon uncinatus Ehrenberg. 



On January 24, this form was abundant in algae at the point 

 where the spring water enters the larger pond (Station E). 



Length 21/1. 



Chilodon vorax Stokes. 



This species was common on February 9 on alga-covered 

 poplar roots at Station D, and in algae at Station E. 



Length 128-176^. 



Family ChiliferidcF. 



Glaucoma scintillans Ehrenberg. 



This attractive organism, though common during February 

 and March, in newly collected algae from submerged posts- 

 (Stations I and V), and on alga-covered poplar roots, became 

 very abundant in those cultures after decomposition had set in. 



Length 48-64^. 



Frontonia leucas (Ehrenberg). 



This form was abundant in sediment drained from leaves at 

 Station A, during October and November. The organisms were 

 brightly colored because of the presence of ingested diatoms and 

 Carteria cells. 



Length 288-400/1 ; diameter 80-112/1. 



Frontonia sp.? 



This organism was abundant in Oedogonium filaments 

 (Station H) and in algae from submerged posts (Stations- 

 I and I'). 



Length 144-160m; breadth 96-1 12/i. 



Ophryoglena sp.? 



Several individuals similar to Figure 221 of Conn (1905) 

 were taken on alga-covered poplar roots at Station D, on 

 February 9. 



Length 112/i. 



