6g8 



Microscopical Essays. 



For the 339th, 340th, and 341ft, the author refers to the 

 Zool. Dan. he terms them vorticella cyathina, vorticelia putrina, 

 vorticella patellina. 



342. Vorticella Globularia, 



Vorticella fimplex, fphaerica, pedunculo retortili. Simple, 

 fpherical, with a twilled pedicle. 



The little head is fpherical, the aperture of the mouth ciliated, 

 the pedicle four times longer than the body, which it contracts 

 in a fpiral form. It is frequent among the cyclope quadricorni. 



343. Vorticella Lunaris. Fig. 54, Plate XXVI. 



Vorticella fimplex, hemifphaerica, pedunculo retortili. Sim- 

 ple, hemifpherical, with a twifted pedicle. 



The fmall head of this animalculum is crater-form (goblet- 

 fhaped), the margin of the orifice protuberant, ciliated on both 

 fides, the hairs undulating, the pedicle eight or ten times the 

 length of the body. As often as the mouth is opened, the pedi- 

 cle extends itfelf ; when it is (hut, this is twifted up fpirally, and 

 thefe motions are often reiterated in a fhort fpace. a the head 

 when expanded, b when {hut, c the undulated edge, d the cilia 

 ereft, e when horizontal, f the pedicle when ftrait, g when bent. 



344. Vo* 



