PROTOZOA 



227 



Mastigophora. They have one flagellum and locomotion may be assisted 

 by rhythmical motions of the protoplasm. They are large and contain 

 considerable gelatinous matter enclosed within the strong pellicula. One 

 species, Noctiluca miliaris, which is found in all seas is largely responsible 

 for the phosphorescence of the water. 



FIG. 127. Eimeria Schubergi, a sporozoan parasitic in the intestinal epithe- 

 lium of Lithobius. A-C, Three steps in the formation of sporozoites (asexual); 

 D, microgametes; E, macrogamete; F-G, fertilization; H-K, three steps in the 

 formation of spores (sexual). 



51-3. Class III. Sporozoa. The class Sporozoa includes 

 those protozoa which at one time in their life cycle multiply 

 by the formation of spores. The spores are usually enclosed in 



