80 



PROTOZOA 



The Mastigophora (Fig. 27) are divided into two groups: (1) Those 

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

 zoic. Saprophijtic 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. Such species live in the intestinal 

 tract or blood stream of man or in the intestines of insects. (2) Those 



Fig. 27. — Several different species of Mastigophora. A, Proterospongia haeckeli Kent. 

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

 Wcnyon, in Archiv fur Protistcnkunde, Suppl. I.) X 2200. C, Trypanosoma gambiensc 

 Button. {From Wcnyon, "Protozoology," by the courtesy of William Wood & Company.) 

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

 aureus Ehrenberg. {From Dojlein, " Lchrbuch der Protozoenkunde," after Klein, by the 

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

 from parthenogonidia. F, Uroglcnopsis amcricana (Calkins). X 350. 



which are more plantlike and which may be holophytic, saprophytic, or 

 entozoic. 



An interesting form is the genus Proterospo?igia, 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, 

 lives in the small intestine of man. These are both animal-like, as is 

 also Euglena. 



