Microscopical 



Essays. 



6i 7 



306. Vorticella Truncatella. 



Vorticella cylindrica, differta, apice truncata, ciliis breviufcu- 

 lis. Cylindrical vorticella, fluffed or filled, the apex, truncated, 

 with very fhort cilia. 



It is of the number of the larger animalcula, the body is crys- 

 talline, and replete with black molecules, it's fkin is perfectly 

 fmooth and colourlefs, it's hinder extremity is rounded, the ante- 

 rior is truncated ; there is a large opening vifible at this extremity, 

 which ferves as a mouth ; this is thickly ciliated, 



307. Vorticella Limacina. Fig. 60, Plate XXVI. 



Vorticella cylindrica, truncata, ciliis bigeminis. Cylindrical 

 truncated vorticella, with two pair of cilia. 



308. Vorticella Fraxinina. 



Vorticella gregaria, cylindracea, oblique truncata, ciliis 

 bigeminis, apice margine fhTa. Gregarious cylindrical vorticella, 

 obliquely truncated, with two pair of cilia, and a fiffure or notch 

 at the upper edge. 



The greater part of the body is cylindrical, the hinder-part is 

 rather tapering, and filled with opake molecules ; towards the 

 upper end it is tranfparent ; within the edge, at top, are two 

 fmall tubercles, from each fide of which a pair of fmall hairs 

 proceed, 



4 F 309. Vor- 



