6io 



Microscopical Essays. 



287. Vorticella Burfata. Fig. 32, Plate XXVI. 



. Vorticella viridis, apertura truncata, papillaque centrali. 

 Green vorticella, the aperture truncated, with a central papillary 

 projection. 



Ventricofe, crammed with molecules, the fore-part truncated, 

 and both fides of it, c c, pellucid ; in the center of the aperture 

 there is a prominent papilla or nipple b, which, when the ani- 

 makulum is at reft, appears notched 5 the edge a a of the aper- 

 ture is furrounded with cilia ; thefe are fometimes all erected, 

 mining, and in motion, or part bent back and quiefcent, and 

 part in motion ; fometimes a few of them are collected together, 

 and turned back like little hooks, one on each fide. Found in 

 fait water, a the cilia, b the projecting papilla, c the pellucid 

 fpace at the fore-part. 



288. Vorticella Varia. 



Vorticella cylindrica, truncata, opaca, nigricans. Cylindrical, 

 truncated, opake, blackifh-coloured vorticella, the fore-part 

 ciliated. 



289. Vorticella Sputarium. 



Vorticella ventrofa, apertura orbiculari, ciliis longis raris ex- 

 centricis. Ventrofe vorticella, with an orbicular aperture, and 

 long hairs radiating as from a center, 



This 



