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



Epistylis flavicans Ehrenberg. 



This species was common in floating Spirogyra (Station C), 

 in algae from posts (Stations I and I') and on alga-covered 

 poplar roots from Station D. It was common throughout the 

 period of study except during the month of January. 



Length of zooid 208m- 



Vaginicola globosa (d'Udekem). 



One individual of this species was found in algae from 

 Station G. It was attached to the perisarc of the stalk of 

 Vorticella aperta. 



Length of lorica 48m; of extended zooid 64jLt. 



Thuricolopsis innixa Stokes. PI. Ill, Figs. 4 and 4a. 



This form was taken on January 24, in algae from a sub- 

 merged stone at Station G. When found, the animal was 

 contracted and remained in this state for about two hours. 

 During this time the nucleus was plainly visible and appeared 

 narrow and band-like as shown in the figure. Food vacuoles 

 formed rapidly after the organism became active. The writer 

 has included drawings (PI. Ill, Figs 4 and 4a) of this not very 

 common ciliate, since no satisfactory drawing was found in 

 any of the available literature. 



Length of lorica 16(V; diameter 48^; length of pedicle lOju. 



? PI. Ill, Fig. 8. 



This organism shown only in outline in the figure indicated, 

 was found in algae scraped from a submerged stone at Station G. 

 The material was collected on December 3. It was apparently 

 a hypotrichous ciliate, yet the presence of cilia other than those 

 of the peristomial field was not determined. The animal was 

 somewhat pear-shaped ; the peristomial field extended about half 

 way to the posterior end and was bordered by long, stout cilia. 

 An oval nucleus occupied a central position in the cell. The 

 oddest thing about the organism was the fact that it bore two 

 exceedingly long cilia diagonally placed, and these waved 

 continuously. 



Length 36^- 



