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TEXTBOOK OF ZOOLOGY 



1. Class Mastigophora (mas ti gof '6 ra) which means whip bear- 

 ers, includes forms that possess one or more whiplike extensions of 

 the cytoplasm, or flagella. The number of flagella is limited, and 

 they serve the animal as its means of locomotion. In some species 

 they serve the organism in feeding. The flagellum is a contractile 

 structure. There are some species in which exist both flagellate 

 and amoeboid stages. This seems to show a rather close relation 

 of this class to the next. This class also has a close relationship 

 with plants in that many of its representatives possess chlorophyll. 



Cercomonas 



111 _ \>asis 

 Monosiga 



Cht lononas 



Codonosiga. 



Phaous 



Trachelmonas 



Peranema Maatigamoeba 



Fig. 23. — Group of representative Mastigophora. (Reprinted by permission 

 from Curtis and Guthrie, Textbook of General Zoology, published by John Wiley 

 and Sons, Inc.) (Figure of Chilomonas modified.) 



These forms are frequently classified as plants b}^ botanists. The 

 class Mastigophora is divided into two groups: (a) the animal-like 

 forms which may be holozoic, saprophytic, or entozoic, and (b) 

 those more plantlike forms which may be holophytic, saprophytic, 

 or entozoic. Holozoic refers to forms which ingest and digest food 

 material. Saprophytic refers to the habit of absorbing nonliving 

 organic matter in solution directly through the surface of the body. 

 Entozoic is a name applied to forms which live within the bodies of 

 other animals, as in the intestine or the blood stream. 



