24 DROPS OF WATEll. 



bells, hollow spheres, &c. ; there are also others 

 like different kinds of fruit, flowers, fish, eels, 

 and serpents ; others, again, are egg-shaped, 

 round, square, three-cornered, oval, spiral, spindle- 

 shaped, star-shaped; besides some representing 

 funnels, cylinders, flasks, and many having an 

 apparatus which perfectly resembles a rapidly- 

 turning wheel. Most of these forms will be 

 noticed hereafter, when the genera and species 

 are more minutely described. 



Animalcules have either a soft naked body, 

 or are covered with a kind of siliceous shell, or 

 horny case, which is transparent, and varies much 

 in form ; in some instances nearly covering the 



* "In some cases it is composed entirely of silica; in others, of liine, 

 with a portion of oxide of ixon."-Pritchard. 



