THE VORTICELL^E. ,47 



The highly magnified view of a single Annulated 

 Vorticella, ( Vorticella convallaria), in the annexed lig- 

 nograph, very distinctly displays the zones of cilia, and 

 the globular stomachs. 



__ 1 



LIGN. 2. A detached VORTICELLA CONVALLARIA, highly magnified, 

 a, The CILIA. 6, b, The GLOBULAR STOMACHS. 



The Vorticella3, like the Monads, increase by self-di- 

 vision. A fissure begins to extend through the longest 

 diameter of the cup, and continues till it is completed, 

 (pi. in, fig. 2), the two portions in the meanwhile la- 

 pidly acquiring the perfect form of the species. A 

 fringe of cilia next appears round the base of each, (pi. 

 in, fig. 3 a, and fig. 4), and the bodies then separate 

 from the pedicle, which soon perishes. The liberated 



