188 



SPOROZOA. 



Remarks. — ^AU the stages of development are extracellular, 

 but are more or less intimately attached to the epithehal cells 

 of the host. Laveran and Mesnil searched in vain for the 

 intracellular stages, and remarked that if they exist they 

 must be of a very short duration. They thought it probable 

 that the organism nourishes itself at the cost of the epithehal 

 cells by means of pseudopodia, and that the projections 

 of the oocyst are their chitinous representations. 



Habitat. — Intestine of the tortoise, Chinemys reevesii (Gray) : 

 Ceylon. 



117. Eimeria najse Ray & Das-Gupta. (Fig. 91.) 



■fEimeria najse, Kay & Das-Gupta, 1936 h, p. 345 ; 1937 d, pp. 275-7, 

 pi. viii. 



Schizogony results in the formation of eight merozoites, 

 belonging to two types, either spherical or oval in form. 

 One type shows vacuolar cytoplasm and a distinct karyosome 



Fig. 91. — Eimeria najse Ray & Das-Gupta. A, intestinal epithelial 

 cells showing (a) young male gametocyte, (6) microgamete 

 formation, (c) growing macrogamete ; B, macrogamete with 

 micropyle and reserve granules ; C, oocyst showing a button- 

 like plug at the micropyle ; D, mature oocyst. (After Ray 

 and Das -Gupta.) 



in the nucleus and later develops into female gametes. The 

 other also shows hyahn cytoplasm, but the nucleus contains 

 few chromatin granules besides the karysome, and later gives 

 rise to male gametes. Fully formed female gametocyte shows 

 a large number of reserve granules in the alveoli of the vacuolar 

 cytoplasm, and a micropyle is also visible, but disappears 

 when the oocyst is formed, a button-like plug being seen 

 instead. Fully formed male gametocyte contains a large 

 number of biflagellate male gametes. Oocysts oval, thin- 



