Schewiakoff and only where they differ markedly are my own mea- 

 surements given. The majority of the pools were small, some being only 

 a few centimetres deep. 



Holotricha. 

 Holophrya Ehrbg. 

 Two species of this genus were found, Holoplirya simplex and Ho- 

 lophrya ovum. 



Holoplirya simplex Schew. 

 Body very small, length 34 ,«, breadth 18 /<. 

 The specimens found were typical. 

 Habitat: Altwasser Breisach (Dec), Zoological Garden (Jan.). 



Holophrya ovum Ehrbg. 



Body of medium size, length 120 ^<, breadth 90//. 



All the specimens found were deep green in colour due to the pre- 

 sence of abundant Zoochlorellae. Many of the specimens were encysted 

 in a smooth, gelatinous, globular cyst. 



Habitat: Lehen (Nov.), Zoological Garden (Jan.). 



Uro tricha Gl. et L. 

 Only one species of this genus was found, TJrotricha farcia. 



Urotricha farcia Cl. et L. 

 Body very small, length 24 /<, breadth 18 a. 



The lip-like band of cilia at the opening of the pharynx was espe- 

 cially prominent in many of the specimens, and in many the posterior 

 end was blunter than in those figured by Roux and Biitschli. 



Habitat: Lehen (Nov.), Lochmatten (Dec), Ziegelei Merzhausen 

 (Dec), Waldsee Upper (Nov., Dec). 



E neh el y s Hill. 

 Of this genus only one species was found, Enchelys farcimen. 



Enchelys farcimen 0. F. Müll. 

 Body very small, length 20—30 /<, breadth 14 — 20 /.t. 

 The specimens were remarkable for their transparency, but were 

 otherwise quite typical. 



Habitat: Lehen (Nov.), Ziegelei Merzhausen (Dec). 



T r a chello phyllu m Cl. et L. 



Of this genus only one species was found, Trachellophyllum apicu- 

 latum. 



Trachellophyllum apiculaium Perty. 



Body large, length 150—200 /<, breadth 15—20 /(. 



