80 



PROTOZOA 



The Mastigophora (Fig. 30) are divided into two groups: (1) Those 

 which are animal-hke and which may be holozoic, saprophytic, or ento- 

 zoic. Saprophytic imphes the absorption of nonUving organic matter in 

 solution directly through the surface of the body. Entozoic means living 

 within the bodies of other animals. Examples are flagellates which 

 live in the intestinal tract or blood stream of man or in the intestines of 



Fig. 30. — Several different species of Mastigophora. A, Proterospongia haeckeli Kent. 

 (From Kent, "A Manual of the Infusoria.") X 530. B , Giardia lambha Stiles. {After 

 Wenyon, in Archiv fur Protistenkunde, Suppl. I.) X 2200. C, Trypanosoma gambiense 

 Button. (From Wenyon, "Protozoology," by the courtesy of William Wood & Company.) 

 X 1330. D, Noctiluca scintillans (Macartney). {From Kent.) X 40. E, Vohox 

 aureus Ehrenberg. {From Doflein, " Lehrbuch der Protozoenkunde," after Klein, by the 

 courtesy of Gustav Fischer.) X 110. A colony containing six daughter colonies, developed 

 from parthenogonidia. F, Uroglenopsis am,ericana (Calkins). X 350. 



insects. (2) Those which are more plantlike and which may be holo- 

 phytic, saprophytic, or entozoic. 



An interesting form is the genus Proterospongia, which is a colony of 

 individuals each bearing a flagellum and around it a protoplasmic collar. 

 Another form, known as Giardia, the structure of which is quite complex, 

 hves in the small intestine of man. These are both animal-like. 



