Microscopical Essays. 



53* 



with grey particles, of different fizes ; it has all round a diftincl: 

 bright margin, the apex of the neck is truncated, the tail obtufe. 



VI. C Y C L I D I U M. 



Vermis inconfpicuus, fimpliciffimus, pellucidus, complanatus, 

 orbicularis vel ovatus. A fimple, invifible, pellucid, flat, orbi- 

 cular, or oval worm. 



83. Cyclidium Bulla. 



Cyclidium orbiculare hyalinum. Orbicular bright cyclidium. 



A very pellucid white animalculum, or orbicular fkin, the 

 edges a little darker than the reft. By the afTiftance of the com- 

 pound microfcope, fome globular cryftalline-like interlines are 

 juft perceptible. It moves flowly and femicircularly. Is found 

 occafionally in an infufion of hay. 



84. Cyclidium Millium. 



Cyclidium ellipticum cryftallinum. Elliptic and cryflalline 

 cyclidium. 



It is very pellucid, and more fplendid than chryftal, membra- 

 naceous, elliptical ; a line is perceived through the whole length 

 of it, a point in the fore-part, the hinder-part getting darker. It's 

 motion fwift, fluttering, and interrupted ; it is probable that both 

 extremities are ciliated. 



3 T 2 



85, Cycli- 



