186 



SPOKOZOA. 



develop into macrogametes, and (6) microschizonts, producing 

 six to eight micromerozoites, which become microgametocytes 

 and give rise to numerous uniflagellate microgametes. The 

 microschizonts are distinguished by the absence of darkly 

 staining granules from their cytoplasm, while the macro- 

 schizonts show the granules scattered through the cyto- 

 plasm from a very early stage. Sporogony is strictly intra- 

 cellular. The oocyst occurs in the intestinal epithelial cell, 

 is spherical, and develops four sporoblasts ; there is no oocystic 

 residuum. The sporocysts are spindle-shaped, and each 

 contains two sporozoites and a residuum. The mature 

 oocysts are dropped into the lumen of the intestine and pass 

 out in the fsecal matter. 



Dimensions. — Young schizont and merozoite 3/x by 1-25 /i 

 to 12/x by 6ju. ; oocyst 8-11 ju, in diameter ; sporocyst 4*5-6 /a 

 by slightly less than 3 [x. 



Remarks. — Of the 200 specimens of Bufo melanostictus 

 examined only two were found to be infected, and schizogony 

 and sporogony were occurring simultaneously in the same 

 individual. 



Habitat. — Small intestine of Bujo melanostictus Schneider : 

 Bengal, Calcutta. 



115. Eimeria legeri (Simond). (Fig. 89.) 



■fCoccidium legeri, Simond, 1901 d, pp. 485-6, figs. 1-6. 

 Eimeria legeri, Wenyon, 1926, p. 860 ; Reichenow, 1929, p. 950. 



Young macrogametes enter the cells of the Hver and grow 

 till they reach a diameter of 16-18 ju,, when they acquire a thin 



B 



rig. 89.- — Eimeria legeri (Simond). A, growing macrogamete ; B, en- 

 cysted condition ; C, oocyst containing sporoblasts ; 

 D, oocyst containing sporocysts ; E, fully developed sporo- 

 cyst ; F, sporozoite. (After Simond.) 



