534 Microscopical Essays. 



The body is pellucid, deprefTed, the fore-part obtufely convex, 

 the hind-part acute, the interlines veficular, the fore and" hind- 

 part on each fide dark. It refembles a grape- feed. 



90, Cyclidium Hyalinum. 



Cyclidium ovatum, poftice acutum. Oval cyclidium, the 

 hind-part acute. 



This cyclidium is oval, flat, and bright, without any vifible 

 interlines, the hinder part fomewhat frnaller than the fore-part ; 

 it has a tremulous kind of motion. 



91. Cyclidium Fediculus. 



Cyclidium ovale convexum, fubtus planun. An oval convex 

 cyclidium, the bottom even. 



Tren.b Icy Polyp. 1. p. 282. 



This is a gelatinous white aniroalculum, the bottom over the 

 back gibbous, the extremities deprefled and truncated, fometimes 

 one end feems cloven into two points, perhaps this is the aper- 

 ture of the mouth. 



It runs upon the hydra pallida as if it had feet, going back 

 again every moment. It is fcarce ever feen but on the arms and 

 the body of the hydra. 



92. Cyclic 



