SPOROZOA, TELOSPORIDIA, COCCIDIA 271 



Caryotropha mesnili Siedlecki. In the body cavity of the 

 marine annelid, Polymnia nebulosa. 



^ Genus Angeiocystis Brasil. Oocysts develop few spores, 

 each containing about 30 sporozoites. 



e 



) 



dy 







Fig. Ill Developmental stages of Aggregala ebertlii. (After Dobell). 



a. A fully mature spore with three sporozoites. X665. 



b. A spore germinating in the midgut of the crab. X665. 



c. A schizont in an epithelial cell of midgut of the same host. 

 X665. 



d. Section of the midgut of the crab with four cysts 

 containing merozoites. X20. 



e. A merozoite in a cell of caecal epithelium of Sepia. X330. 



f. A large cyst with microgametes. X 100. 



g. Fertilization. X330. 



h. Reduction division in the zygote. X330. 

 i. A stage in spore-formation. X120. 



Angeiocystis aitdoniniae Brasil. In the marine worm, Au- 

 doninia tentacidata . 



Family 3 Dobelliidae Ikeda 



Genus Dobellia Ikeda. The schizonts are differentiated 

 sexually. Association of the two schizonts for gametogony be- 

 gins early as in the Adeleidea, but numerous microgametes are 

 produced, which condition is not found in the latter group. 

 One species. 



Dobellia hinucleata Ikeda. In the gut of the sipunculoid 

 Petalostoma minutum. 



Family 4 Eimeriidae Leger 



Genus Eimeria Schneider. The zygote develops four spores, 

 each containing two sporozoites. 



Eimeria schuhergi (Schaudinn) (Fig. 109). 



