Microscopical Essays. 



639 



344. Vorticella Convallaria. 



See page 445 of thefe effays. 



345. Vorticella Nutans. 



Vorticella fimplex, turbinata, pedunculo retortili. Simple, 

 with a twilled turbinated pedicle. 



The pedicle is fimple, and t wills itfeff fpirally, is exceeding 

 {lender, and has a kind of cap on the head ; the margin white 

 and round, and as it were encompafled with a lucid ring; the 

 head diminimes towards the bafe. It is tranfparent. 



346. Vorticella Nebulifera. Fig. 66, Plate XXVI. 



Vorticella (implex, ovata, pedunculo reflexili. Simple, egg* 

 Ihaped, the pedicle bent back. 



The body is narrow at the bafe, open and truncated at top, 

 the margin as it were furrounded with a ring ; but when the aper- 

 ture is fhut, the animalculum is egg-fhaped, the inteftrhes may be 

 feen diftinaiy, the pedicle is fimple, fetaceous, eonfiderably 

 longer than the body, and generally much bent back, a the 

 head open, b almoft fhut, c quite fhut, d the ftalk when ftrait, 

 at e it is bent. 



