Microscopical Essays. 619 



Two of thefe are fometimes feen conjoined together, as at Fig. 

 41, and full of fmalJ fpherules j at this time they may without 

 care be taken for freih animalcula *, they draw each other alter- 

 nately different Ways ; in this ftate the furface is fmooth and 

 the hairs invifible. e moveable cilia. 



312. Vorticella Canaliculata. 



Vorticella dilatata, peliucida, latere incifo. Dilated, pellucid, 

 with an incifion on the fide. 



To the naked eye it appears as fo many white points adhering 

 to. the fides of the glafs ; when magnified, the anterior part is 

 narrower than the hind-one ; in the fide a kind of incifion may 

 be perceived, and the hind-part is a little notched towards the 

 middle ; it is furniflied with a rotatory organ, by which it excites 

 a continual whirling in the water. 



313. Vorticella Verfatilis. 



Vorticella elongata fpiculiformis, mox urceolaris. Long 

 fpear-formed vorticella, but which often changes it's fiiape into a 

 pitcher-like form. 



A pellucid gelatinous animalculum, of a green ifh colour, fur- 

 niflied with fniall radii, particularly about the circumference, 

 whence it may be confidered as a minute water hedge-hog. 



4 F .2 



314. Vor- 



