268 CLASS: MASTIGOPHORA 



II. CLASS: MASTIGOPHORA Diesing, 1865. 

 CLASSIFICATION. 



CLASS: MASTIGOPHORA 

 SUB-CLASS: Phytomastigina 



Order: CHRYSOMONADIDA 

 CRYPTOMONADIDA 

 DINOFLAGELLATA 

 EUGLENOIDIDA 

 PHYTOMONADIDA 



SUB-CLASS : Zoomastigina 

 Monozoic Forms 



Order: PROTOMONADIDA 



Sub-Order: Eumonadea 



Family: monadid^ 



TRYPANOSOMID^ 

 BODONID^ 

 ,, PROWAZEKELLID^ 



EMBADOMONADID^ 



Family : CHILOMASTIGID^ 

 CERCOMONADIDiE 

 CRYPTOBIID.^ 

 TRICHOMONADID^ 

 DINENYMPHID^ 



Sub-Order: Craspedomonadt 



Order: HYPERMASTIGIDA 

 „ CYSTOFLAGELLATA 



Diplozoic Forms 



Order : DIPLOMONADIDA 



Genus : Hexamita 



,, Giardia 



Trepomonas 



Polyzoic Forms 



Order: POLYMONADIDA 



Family : CALONYMPHID^ 



The Protozoa which are included in the class Mastigophora ( = Flagellata 

 Cohn, 1853) are commonly known as flagellates, and comprise a very varied 

 assemblage of organisms which have one feature in common — namely, the 

 possession of one or more flagella. In the case of Protozoa belonging to 

 other classes, flagella may be temporarily present at certain stages of 

 development, as, for instance, in the case of the microgametes of coccidia; 

 but in the Mastigophora the flagella are present during the greater part of 

 the life of the individual, and occur in the active, fully-grown, motile stage 

 of the organisms. The majority of the Mastigophora are free-swimming 

 creatures which move about in liquid media by the lashings of their flagella. 

 Some of them resemble amoebae more than flagellates, for, in addition 

 to swimming, they may crawl over surfaces by means of pseudopodia. 

 Others, again, secrete filaments or stalks, by means of which they are 

 attached to objects. In some cases there is developed at the end of the 

 filament a cup-like receptacle (lorica) in which the flagellate is lodged 

 (Fig. 18). In other cases, groups of flagellates are held together by a 

 common gelatinous matrix, the whole colony moving about as a single 

 unit as a result of the joint action of the flagella of the several individual 

 flagellates. 



In what may be regarded as the most primitive forms the body con- 

 sists of a portion of cytoplasm showing no differentiation into ectoplasm 



