THE GREGARINES AND COCCIDIA 



337 



have described recently a number of new species of Porospora from various 

 Crustacea ; they suggest that the genus Porospora represents the schizogony, 

 the genus Cephaloidophora the sporogony, of the same cycle. 



4. In the peculiar genus Ophryocystis (Fig. 151), parasitic in the Malpighian 





B 



FIG. 148. Selenidium cauUeryi. A, Full-grown iiitracellular schizont, x 850 ; 

 B, stage in the multiplication of the nuclei of the schizont, x 1,200 ; 0, schi- 

 zogony complete, showing the merozoites, x 1,000 ; D, young sporont embedded 

 in an epithelial cell, X 700 ; E, free, adult sporont, x 700. After Brasil (596). 



tubules of certain beetles (Tenebrionidce, Curculionidce, etc.), and formerly 

 regarded as a distinct order of Sporozoa, the Amcebosporidia, a double 

 schizogony takes place ; there are first of all multinucleate schizonts which can 



22 



