OF ANIMALCULES. IQ] 



shewn open and closed, attached to the edge of a leaf of 

 duck-weed, at figure 235. 



391. VoRTicELLA inclinans» — This is closely allied to 

 the preceding, but the bell is generally inclined on its 

 short stem. 



392. VoRTicELLA luuaris resembles the V. convallaria ; 

 but the bell is very broad, except when the stem con- 

 tracts ; it then becomes globular. 



393. VoRTicELLA uutaus — The stem of this Vorticella 

 is very slender ; it twists spirally, and is probably iden- 

 tical with the V. convallaria. 



394. Vorticella acinosa has a bell-shaped body and 

 rigid stem. 



Second Division.— ROTATORIA. 



395. Vorticella senta {Hi/datina, E.) The ciliated, 

 crystal Vorticella, 



We now arrive at the highest class of Infusoria, and 

 in order to avoid repetition I propose to commence with 

 the most perfectly developed species, instead of tracing 

 them upwards as heretofore : by a minute perusal of this, 

 and with the assistance of the drawings of the other 

 species, the reader will obtain a general view of the 

 whole without much trouble. 



The superiority of the Achromatic Microscope, in 

 the quantity of light which it transmits, has enabled 

 the naturalist to develop more of the structure of 

 these creatures than any of the numerous improve- 



