Microscopical Essays. 567 

 169. Lcucophra Armilla. 

 Leucophra teres annularis. Round annular leucophra. 



170. Leucophra Cornuta. Fig. 42 and 43, Plate XXV. 



Leucophra inverfe conica, viridis opaca. An inverted cone; 

 green, ©pake. 



It bears fome refemblance to the vorticella polymorpha and the 

 vorticella viridis, and requires to be obferved for fome time be- 

 fore it's peculiar characters can be afcertained ; the body conv 

 pofed of molecular veficles, of a dark green colour ; for the molt 

 part it is like an inverted cone, the fore-part wide and truncated, 

 with a little prominent horn, or hook, on both fides, the hind- 

 part being conical, every-where ciliated,, the hairs exceeding 

 minute ; thofe in the fore-part are three times longer than thefe, 

 and moving in a circular direction. The hinder-part is pellucid, 

 and fometimes terminates in two or three obtufe pellucid pro- 

 jections. The animalculum will at one moment appear oval, at 

 another reniform, and ciliated on the fore-part ; at another time 

 the hairs are concealed. When the water evaporates, it breaks 

 or diflbives into molecular veficles. It is found late in the year 

 in marfhy grounds. Fig. 42, a the hinder-part pointed, it is 

 obtufe at b, Fig. 43, e the fore -part, g the cilia, f the horn.v 

 k the fides, 



171, Leu*- 



