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 





FIG. 148. Selenidium cautteryi. A, Full-grown intracellular schizont, x 850 ; 

 B, stage in the multiplication of the nuclei of the schizont, x 1,200 ; G, 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, Curcidionidce, etc.), and formerly 

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

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



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