STEUCTUEE AND CLASSIFICATION OF PEOTOZOA 13 



animals, which perform important functions for the 

 benefit of the whole being. There is, moreover, no 

 evidence of an organised nervous system, although 

 something approaching a sense of touch may be 

 possible. 



Of the many classifications of the protozoa it 

 will only be necessary to quote the two most 

 generally accepted. 



The first which is here given w^as drawn up by 

 Professor Eay Lankester in 1891. 



PEOTOZOA. 



Geade a. — Gymnomyxa. (See fig. 11.) 



Sections. 



(Class I. — Peoteomyxa. 



Ex. Vamjjyrella, Protomyxa^ 

 Arclierina. 

 (Class 11. — Mycetozoa, 

 i Ex. The Eu-mycetozoa of Zopf. 

 (Class III. — LoBOSA. 

 I Ex. Amoeba^ Arcella, Pelomyxa. 

 Class IV. — Labyeinthulidea. 



Ex. LahyrintliuJa, Clilamydoinyxa. 

 Class Y. — Heliozoa. 



Ex. Actinojjhrys, Iiaphidio]jlirys, 

 Clatliriilina. 

 Class VI. — Eeticulaeia. 



Ex. Gromia, Litiiola, AsfrorJiiza, 

 Glohigei'iua. 

 Class VII. — Eadiolaeia. 



Ex. TJialassicoUa, Eucyrtidium, 

 Accinthometra. 



Pro feci] I a 



Plasniodiata 

 Lohosa . 



Filosa 



