158 DROPS OF WATER. 



from the under side of the lorica, not from the 

 end of the body. The rotatory organs are divided 

 into several bundles. 



Salpina mucronata (Drop IV. fig. 10) is com- 

 mon, but not less interesting on that account. 

 It is smaller than the last, but of sufficiently 

 large size to render it easy to watch its move- 

 ments. It is lively, but often attaches itself by 

 its forked tail to weeds, for some time, when 

 busy in procuring food ; indeed, it is, I think, 

 particularly voracious, for I have watched a spe- 

 cimen seemingly thus employed, for two hours 

 at a time. In my opinion, this animalcule feeds 

 on vegetable substances almost entirely, for I 

 have frequently seen it clearing away the green 

 pulp from the stalks of duckweed, and leaving 



