160 



CLASS: RHIZOPODA 



Cilia are present throughout 



I. CLASS: CI LI ATA Perty, 1852 

 the life of the organism. 



II. CLASS: SUCTORIA Claparede and Laghmann, 1858.— Cilia 

 are present only during the young stages, which usually attach themselves 

 to objects, lose their cilia, and develop suctorial tentacles, 



A. SUB-PHYLUM: PLASMODROMA. 



I. CLASS: RHIZOPODA V. SlEBOLD, 1845. 



CLASSIFICATION. 



CLASS: RHIZOPODA 



Order: AMCEBIDA 



Family: AMCEBID.^:. 



Genibs : Amoeba. 



,, Hartmannella. 



,, Vahlkampfia. 



„ Sappinia. 



„ Pelomyxa. 



„ Entamoeba. 



„ Endamoeba. 



„ Endolimax. 



„ lodamoeba. 



„ Dientamoeba. 



Family: PARAMCEBID^. 



Genus : Paramoeba. 

 Family: DIMASTIGAMCEBID^. 



Genus : Dimastigamoeba. 

 Family : RHIZOMASTIGID^. 

 Genus : Mastigamoeba. 

 Mastigella. 

 ,, Mastigina. 

 Order: HELIOZOA 



RADIOLA.RIA 

 FORAMINIFERA 

 Genus : Chlamydophrys. 

 Order : MYCETOZOA 



The Protozoa belonging to the class Hhizopoda (= Sarcodina Hertwig 

 and Lesser, 1874) are typically organisms which move, and ingest food 

 by means of pseudopodia. These are cytoplasmic processes of varying 

 form which are protruded from the surface of the body, and which, 

 after fulfilling their function, are withdrawn. They may be merely 

 short, stumpy elevations, or more elongate finger-like processes (Fig. 5). 

 Sometimes they are very fine, and give the organism a radial appear- 

 ance. Such radiating pseudopodia, seen typically amongst the Heliozoa, 

 may be supported by stiff axial fibres, which cause them to be more 

 permanent structures (Fig. 71). There may be but a single pseudo- 

 podium, another one being protruded only when the first has been 

 withdrawn; several may be developed at one time, or large numbers are 

 produced simultaneously from the whole surface of the body. In the 

 latter case, anastomoses may be formed between adjacent pseudopodia, 

 so that the organism has the appearance of being surrounded by a loose 

 network of cytoplasm. They may be shorter than the diameter of the body, 

 or many times this length. The cytoplasm may be differentiated into a 



