53^ Microscopical Essays, 



gular aperture, and giving it fomewhat the appearance of a gimlet. 

 It's motion is rectilinear, vacillatory, and generally vehement. 



They may often be feen cohering lengthways ; the lateral edges 

 of both bodies appear bright. They may alfo fometimes be feen 

 •lying on one another by turns, and fometimes cohering by the 

 middle. They live many months in the fame water if it is not 

 renewed. They are to be found in June, in ditches where there 

 is plenty of duck-weed. 



94. Paramecium Chryfalis. Fig. 26, Plate XXV. 



Paramecium cyl indraceum, verfus anticam plicatum, pofficeob- 

 tufum. Cylindrical paramecium, folded towards the fore-part, 

 the hinder-part obtufe. 



It differs but very little from the preceding, only the ends (a b) 

 are more obtufe ; the margin is filled with black globules, and it 

 is an inhabitant of fait water. 



05. Paramecium Verfutum. 



Paramecium cyl indraceum, poftice incraflatum, utraque ex- 

 tremitate obtufum. Cylindrical paramecium, the lower part 

 thick, and both ends very obtufe. 



An oblong body, green, gelatinous, filled with molecules, the 

 lower part thick, the fore-part fmaller, both ends obtufe, and 

 may be feen to propagate by divifion* Is found in ditches. 



96. Para- 



