Marvels of Pond- Life. 71 



It was possibly very young, and did not thrust out its 

 cilia in two distinct tufts, as Cohn describes, although 

 it may have had the power of doing so. At times it 

 sprang quickly backwards and forwards, bringing its 

 head where its tail was before. This object required for 

 its comfortable elucidation a power of about six hundred 

 linear. 



S3 



(Ecistes crystallinus. 



Among the common water-plants, which are worth 

 examining as the probable abodes of rotifers or in- 

 fusoria, is the pretty little thing called " star-weed," 

 some of which was obtained from the last-mentioned 



