5 3<3 Microscopical Essays. 



cules. The neck (d) is three or four times longer than the body, 

 of an equal fize throughout, except a fmall degree of thicknefs at 

 the apex (f) very pellucid. The neck is very lively in it's mo- 

 tions, the body flow. 



Is found in water that is kept for a long time, and which is full 

 of a vegetable greennefs. 



81. Vibrio Falx. 



Vibrio gibbofus, poftice obtufus, collo falcato. A gibbous 

 vibrio, the hind-part obtufe, the neck crooked. 



The body is pellucid, elliptical, the fore-part lefTening into a 

 little round bright neck, nearly of the fame length as the trunk, 

 the hind-part obtufe. The trunk itfelf is rather rounding or 

 tending to the gibbous, and filled with very fmall molecules ; 

 there are alfo two bright globules, one within the hind extremity,, 

 the other in the middle of the body. The immobility of the neck 

 gives it motions much the refemblance of a fcythe. 



82. Vibrio Intermedins. 



Vibrio membranaceus, antice attenuatus, poftice fubacutus, 

 Membranaceous- vibrio, the fore-part fmall, the hinder-part 

 fo me what acute. 



It feems to be an intermediate fpecies between the vibrio falx 

 and the fafciola ; it is a thin membrane, conftantly folded. The 

 whole of it is of a ciyftalline talcy appearance, the middle replete 



with 



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