6iS 



Microscopical Essays. 



309. Vomcella Cratsegaria. 



See page 437 of this work. 



310. Vorticella Hamata. Fig. 40, Plate XXVI. 



Vorticella burfaeformis, margine aperture aculeis rigid is. 

 Purfe -formed vorticella, the edge of it's aperture or mouth fet 

 with rigid points. 



It is not ciliated, nor have any hairs as yet been difcovered 

 about it ; the body is granulated, the fore-part broad and trun- 

 cated, the hinder-part obtufe, and capable of being contracted or 

 extended, a the rigid points. 



311. Vorticella Crateriformis. Fig. 41, Plate XXVI. 



Vorticella fubquadrata, ciliorum fafcicuiis etiam poftice. 

 This vorticella is rather of a fquare figure, and has fafcicles of 

 cilia even at the hinder-part. 



Lively, pellucid, round, longer than it is broad, approaching 

 fomewhat to a fquare, with convex fides ; the head is fituated at 

 the large end, the fkin is fmooth, fome traces of interlines are 

 with difficulty difcovered; at the larger end there is a confider- 

 able opening, furrounded by hair; the filaments compohng this 

 are in continual motion. 



5 



Two 



