410 



PROTOZOOLOGY 



Fig. 185. The life-cycle of Schizocystis gregarinoides, XlOOO (L^ger). 

 a, germinating spore; b, growth of schizonts; c, schizogony; d, two 

 gametocytes and their association; e, stages in gamete formation, 

 f, gametogony, g, cyst containing zygotes, each of which develops into 

 a spore shown in a. 



cytes; spore with 8 sporozoites; in Malpighian tubules of Coleop- 

 tera. Several species. 



0. mesnili Leger (Fig. 186, a-e). In Tenehrio molitor; schizonts 

 1-4 nuclei; gametocytes IIjj. in diameter; pairs 16-17/x by llju; 

 spores biconical, 11/i by 7//. 



Genus Merogregarina Porter. Schizogony intracellular; troph- 

 ozoites attached to gut epitheUum by proboscidiform organel- 

 lae; resembles somewhat Selenidium, but 2 gametocytes giving 

 rise to one spore containing 8 sporozoites. 



M. amaroucii P. (Fig. 186, /, g). In gut of the ascidian, Ama- 



