C 21 ] 



P LA T E VIIL 



VORTICELLA LUNARIS. 



GENERIC CHARACTER. 



A worm capable of contracting or extending itfelf, naked, with 

 rotatory cilia. 



, SPECIFIC CHARACTER, 

 Simple^ hemifpherical) with a twilled pedicka 



" The fmall head of this animalculum is crater-form, the margin 

 *' of the orifice protuberant, cihated on both fides, the hairs undula- 

 *' ting, the pedicle eight or ten times the length of the body. As 

 " often as the mouth is opened, the pedicle extends itfelf j when it is 

 " fhut, this is twilled up fpirally, and their motions are often reite- 

 " rated in a fhort fpace. 



" Fig. I. the head, expanded.- Fig. 2. when fhut. Fig. 3, 



*' the undulated edge." 



Adanis's Ejfays on the Microfcope, 



Fig. 4. found in infufions of hay j and is called Trichoda Uvula, 



D2 PLATE 



