640 



Microscopical Essays* 



347. Vorticella Annularis. 



V orticella fimplex, truncata, pedunculo apice retortili. Sim* 

 pie, truncated, with a pedicle twilled at the end. 



This is vifible to the naked eye ; the head an inverted cone, 

 convex when the mouth is (hut, truncated when it is open, -with 

 a protuberant edge, the pedicle is fimple, very long, thick, and 

 whiter at the top than elfewhere, formed into a little head, the 

 apex is twilled fpirally. This animalculum, when contracted, 

 appears to be annulated. 



348. Vorticella Acinofa. 



See page 440 of this work. 



349. Vorticella Fafciculata. 



Vorticella fimplex, viridis, campanulata, margine reflexo, pe- 

 dunculo retortili. Simple, green, bell-fhaped, the margin or 

 edge turned back, the pedicle twifted. 



A congealed green maf\ ..Inch is often fwimming about in 

 ditches, is compofed of myriads of thefe animalcula, which are 

 not vifible to the eye ; when magnified, they appear as a bundle 

 of green flowers. The head is bell-fhaped, green, opake, narrow 

 at bottom, pellucid. It has a rotatory organ, which may fome- 

 times be feen projecting beyond the aperture; the pedicle is 

 twifted and very (lender ; a little head at the apex. 



4 35°- Vo *"- 



