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



The animal's movements were very erratic. It would dart 

 swiftly in one direction, then like a flash, whirl directly about 

 and move in the opposite direction. After coming to rest, 

 it would occasionally project from the lorica, then almost 

 immediately withdraw into it again. 

 Length of lorica 64)U. 



Order Hypotrichida. 

 Family Oxytrichidce. 



Urostyla grandis Ehrenberg. 



This species was common in February in algae from a 

 submerged stone at Stations G and K. Late in March it was 

 taken in sediment near the outlet of the larger pond (Station K). 



Length 176-400/1; breadth 128^. 



Stichotricha sp.? PI. Ill, Fig. 5. 



This form appeared in a three months old culture of floating 

 Spirogyra from Station C, collected on October 31. The 

 animal was flask shaped, its anterior two thirds attenuate 

 and neck like; the peristomial field, fissure-like and extending 

 two-thirds of the way to the posterior end and edged by 

 remarkably long cilia. Two oblique rows of ventral setae were 

 present. A large vacuole situated on the right side a fourth of 

 the distance from the posterior end pulsated rhythmically. 

 The writer was unable to identify this organism with any of 

 the described species of the genus Stichotricha. 



Length 144/z. 



Uroleptus dispar Stokes. 



One individual was taken on March 15 among filaments of 

 Oedogonium at Station H. 



Length 176/i. 



Oxytricha caudata Stokes. 



This species was taken a very few times among alga-covered 

 poplar roots (Station D) and at the point where the spring 

 water enters the larger pond, during the fall. One was found 

 late in February in sediment (Station B), and another on March 

 15, in algae from submerged posts at Stations I and I'. 



Length 240/x. 



