THE SPOROZOA 



187 



on the other hand, Leger and Duboscq [24] have described conjuga- 

 tion between gametes differentiated in a manner more in accord- 

 ance with accustomed types of anisogamy. The gametes formed 

 in the female chamber resemble telolecithal ova, having the 

 nucleus situated in a patch of formative protoplasm at one pole, 

 while the rest of the cell is occupied by coarse vitelline granules. 

 The male gametes, on the contrary, are very minute, like those 



Fio. 81. 



Stages in the life-history of Ophryocystis butschlii, A. Sclm (par. Blaps mortisaga). a, large 

 multinucleate trophozoite with pseudopodium-like processes, b, small trophozoite with one 

 nucleus, produced by the dividing up of a large individual, c, d, e, association and encystment 

 of two sporonts. f-h, division and diminution of nuclei, i, single spore formed from the 

 zygote, with two residual nuclei in each half of the cyst, j, cyst with single spore and two 

 masses of residual protoplasm, k, ripe cyst with epicyst formed in numerous separate layers 

 and endocyst enclosing the single spore and the remnants of the residual protoplasm. (From 

 Wasielewski, after A. Schneider.) 



of Coccidia, and consist almost entirely of chromatin substance, 

 nearly the whole protoplasmic body of the male gametocyte being 

 left behind in the male chamber as residual protoplasm, from 

 which the pseudocyst (see above, p. 183) is formed. The body of 

 each microgamete is described as being filamentous, 5 or 6 /x 

 in length, with a refringent rostrum anteriorly and a flagellum, 



