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



Nuclearia delicatula Cienkowski. 



Several individuals were taken on December 3 among algae 

 at Station E. They were similar to Leidy's figures of Hetero- 

 phrys myriapoda, (1879; PI. 46, Figs 4 and 7). The latter name 

 has been shown by Cash (1905) to be synonymous with Nuclearia 

 delicatula. * 



Diameter 40/i. 



Nuclearia sp.? 



This form was abundant among algae from the bowl of the 

 spring during the entire time that material was taken from this 

 station. The individuals were very often colored a bright 

 yellow and agreed with Leidy's figures, (1879; PI. 15, Figs 2 

 and 3, and PI. 16, Fig. 13), of Heterophrys sp.? Cash (1905) 

 has shown this genus to be synonymous with Nuclearia. 



Diameter 64-90^. 



Order Chalarathoracida. 



Raphidiophrys viridis Archer. 



Throughout the period of study this species was taken at a 

 variety of stations, but occurred abundantly only at Stations 

 I and r, in algae scraped from submerged posts. 



Diameter 43-80/i. 



Raphidiophrys pallida Schulze. 



Late in November and early in December this form was 

 common among alga-covered poplar roots (Station D). The 

 spicules on the animal were very long and numerous. 



Diameter 96ju. 



Acanthocystis sp.? 



This species was abundant during December and January 

 among algae scraped from posts at Stations I and I', and it was 

 taken also on alga-covered poplar roots at Station D. The 

 animals taken in Mirror Lake were very similar to Leidy's 

 figures, (1879; PL 43, Figs 14 and 16). 



Diameter 53/x. 



