17 



CHAPTER II 



THE CLASSIFICATION OF THE EHIZOPODA 



The name Ehizopoda was first used by Dujardin to 

 designate that group of the Protozoa which have the 

 abihty of throwing out extensions of protoplasm 

 called pseudopodia, which may be used either for 

 prehension and locomotion or for the purpose of 

 gathering minute organisms for food, whence they 

 derive the name Ehizopoda (root-footed animals). 

 This class of animal is characterised b}' its extreme 

 simplicity of structure, and is represented in a 

 general sense by the amcehoid type. In strict signi- 

 fication, how^ever, the amwha differs from the Forami- 

 nifera in having the pseudopodia finger-like or lobose 

 {Lohosd ; see fig. 8), whilst the Foraminifera have 

 thread-like and anastomosing extrusions of sarcode 

 {JReticularid). See fig. 3. 



The Ehizopoda, according toDujardiu, constituted 

 a family of the Infusoria, and his arrangement com- 

 prised eight genera, as follows : — 



1, Arcella ; 2, Difflugia ; 8, Teinema ; 4, Eu- 

 GLYPHA ; 5, Geomia ; (3, Miliola ; 7, Ckistellaeia ;. 



8, VOETICIALIS. 



This arrangement did not include many important 

 forms, and gave distinction to others now known to 

 be closely related. 



Another scheme of the Ehizopoda was published 



C 



