C 21 ] 



PLATE VIII. 



VORTICELLA LUNARIS. 



GENERIC CHARACTER. 



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

 rotatory cilia* 



SPECIFIC CHARACTER. 

 Simple, hemifpherical, with a twifled pedicle. 



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

 " of the orifice protuberant, ciliated 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 5 when it is 

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

 *' rated in a fhort fpace. 



" Fig. 1. the head, expanded. Fig. 2. when mut.— — Fig. 3. 



" the undulated edge." 



Adams's Ejjays en the Mkrofcope, 



Fig. 4. found in infufions of hay ; and is called Trkhoda Uvula. 



D2 PLATE 



