EUPLOTES AND STYLONICHTA. 87 



which take the place of the limbs of more elaborately- 

 constructed creatures, and give a variety to their 

 means of locomotion. The Euplotes is furnished with 

 an oval carapace covering the upper surface, which 

 in different individuals, and probably at different 

 ages, exhibits slightly varied markings round its 

 margin, which in the specimen drawn below con- 

 sisted of dots. They can run, climb, or swim, and 

 exemplify a singular habit which several of the 



A, Euplotes (pitella;) B, side view of ditto; C, Stylonichia. 



infusoria possess, that of moving for a little time in 

 one direction, and then suddenly, and without any 

 apparent cause, reversing it. If the reader is fond 

 of learned appellations, he can call this diastrojthy^ 

 but we do not know that he will be any tlie wiser 

 for it. 



The Stylonichia are oval animalcules, surrounded 

 by cilia, and having moreover a collection of styles, 

 both straight and curved, the latter called iincini^ 



