Ml CPvOSCOPIC AL 



Essays. 



535 



92, Cyclidium Dubium. 



Cyclidium ovale, fupra convexum, fubtus cavum. Oval cy- 

 clidium, the upper part convex, the under part concave. 



This is one of the larger fpecies, the body is of an oval fhape, 

 one fide is convex, the other is concave, the margin is pellucid, 

 the inner part contains a great number of black molecules. 



VII. Paramecium. 



Vermis inconfpicuus, fimplex, pellucidus, membranaceus, 

 oblongus. An invifible, fimple, pellucid, membranaceous, flat 

 worm, 



93. Paramecium Aurelia. 



Paramecium compreffum, verfus anticam plicatum, poih'ce 

 acutum. Paramecium comprefled, oblong, folded towards the 

 fore-part, the hinder-part acute. 



Vol vox Terebella. Ellis,. 



This is rather a large animalculum, membranaceous, pellucid, 

 four times longer than it is broad, the fore-part obtisfe, tranfpa- 

 rent, without interlines, the hind-part replete with molecules of 

 various fizes ; the fold which goes from the middle to the apex is 

 a (Inking chara&eriftic of the fpecies, forming a kind of trian- 

 gular 



