Microscopical Essays. 



637 



336. Vorticella Ringens, 



Vorticella fimplex, obovata, pedunculo mini mo, orificio con- 

 tra&ili. Simple, fomewhat of an oval fnape, a fmall pedicle, an 

 orifice that it contracts or dilates. 



The fmall head, or rather body, of this little creature is pear- 

 fhaped, pellucid, the middle of the aperture convex, both fides 

 ciliated, the pedicle four times fhorter than the body ; it can con- 

 tract the orifice to an obtufe point. 



337. Vorticella Inclinans. 



Vorticella fimplex, deflexa, pedunculo brevi, capitulo retrac- 

 tile Simple, bent, with a fhort pedicle, and fmall retractile 

 head. 



A pellucid pendulous little head, the anterior part truncated, 

 and is occafionally, by contraction, made twice as Ihort as the 

 pedicle ; it's fhape is like that of a tobacco-pipe. 



338. Vorticella Vaginata. 



Vorticella fimplex, erecla, ovato-truncata, pedunculo vagina- 

 to. Simple vorticella, erect, of the fhape of a truncated egg, 

 the pedicle contained in a (heath, 



For 



