52 8 



Microscopical Essays. 



empty fpace. The apex is obtufe, and rather globofe ; it has a 

 power of contracting and drawing in the filiform part. 



77. Vibrio Anas. 



Vibrio oblongus, utroque line attenuatus, collo cauda longiore. 

 Oblong vibrio, both ends attenuated, the neck longer than the 

 tail. 



The trunk round, oblong, opake, and crammed with mole- 

 cules. Both the fore and the hind-part is prolonged into a pellu- 

 cid talcy membrane, which the animalculum has a power of re- 

 tracting at pleafure. The neck is longer than the tail, and the tail 

 is more acute than the neck. It is mod generally found in fait 

 w T ater ; a fpecies of them have been found in river water, with a 

 longer neck. < 



78. Vibrio Cygnus.. 



Vibrio ventricofus, collo adunco. Corpulent vibrio, with a 

 crooked neck. 



This animalculum is little more than a mod pellucid line, 

 crooked at top, prominent in the middle, and fharp at the end; 

 the fore-part, or neck, is equal in length to the reft of the body, 

 and three times longer than the hind-part, or tail, the interme- 

 diate part fwelling out, and is full of darkim molecules and pel- 

 lucid interlines. It is very fmall, and the moft flothful of all 

 •jhofe which move and advance their necks. 



jg. Vibrio 



