Microscopical Essays. 



527 



This is a pellucid animalculum, in the middle are the interlines 

 in the form of points 5 an alimentary pipe, which Mens gradually 

 in iize, is alfo perceptible. 



The motion of it is quick, darting itfelf up and down the 

 water with great velocity. It is found in water jult loofened 

 from the froft, and feldom elfewhere. 



75. Vibrio Colymbus. 



Vibrio craffus, poftice acuminatus, collo fubfalcato. Thick 

 vibrio, fharpened at the end, the neck a little bent. 



It is larger than raoft of the vibrios, and not unlike a bird in 

 Ihape. The neck is round, fliorter than the trunk, of an equal, 

 fize throughout, and of a bright appearance, the apex obtufe. 

 The trunk is thick, fomewhat triangular, full of yellow mole- 

 cules ; the fore-part broad, the hinder-part acute, the motion- 

 flow. - - •■> 



76. Vibrio StricluSo 



Vibrio elongatus linearis, - anticem verfus attenuatus, apice ob- 

 tufo. Vibrio lengthened out almoft to a line, fmall towards the 

 fore-part, the apex obtufe. 



The body linear, being a membranaceous bright thread, with- 

 out any flexure ; the hind-part thicker, round, and filled with 

 molecules, excepting juft the end, where there is a fmall pellucid 



6, empty. 



