872 INFUSORIA. 



which he has arranged as the fourth great division of the Animal Kingdom. 

 Lamarck divides the Infusoria into two orders : 



I. Infusoria Apfendiculata. — With projecting parts at their exterior, as 

 hairs, horns, or a tail. 



II. Infusoria Nuda, or naked Infusoria. — Destitute of exterior appen- 

 dages. 



