COCCIDIA 



587 



Fig. 252. a, Isospora felis, X930 (Wenyon); b ; /. lieberkuhni, X660 

 (Laveran and Mesnil); c, Cyclospora caryolytica, X1330 (Schaudinn); 

 d, Dorisiella scolelepidis, oocyst with two spores, X1400 (Ray); e, f, 

 Caryospora simplex, XSOO (L6ger); g-i, Cryptosporidium muris (g, h, 

 oocysts; i, emergence of four sporozoites), X1030 (Tyzzer); j, Pfeif- 

 ferinella ellipsoides, X1330 (Wasielewski) ; k, P. impudica, X800 (L£ger 

 and Hollande) ; 1, Lankesterella minima, a mature cyst in endothelial cell, 

 XlOOO (Noller); m, Barrouxia ornata, X1330 (Schneider); n. Echinospora 

 labbei, XlOOO (Leger). 



into 2 spores, each with 8 sporozoites; macrogametocytes migratory. 



D. scolelepidis R. (Fig. 252, d). In the gut of the polychaete, 

 Scolelepis fuliginosa; zygote contents divide into 2 oval spores, 12- 

 16m by 6-10/x; spore with 8 sporozoites (Ray, 1930). 



Genus Caryospora Leger. Oocyst develops into a single spore 

 with 8 sporozoites and a residual mass; membrane thick and yellow. 

 One species. 



C. simplex L. (Fig. 252, e,f). In the gut-epithelium of Vipera aspis; 

 oocyst thick-walled, 10-1 5^ in diameter. 



Genus Cryptosporidium Tyzzer. Lumen-dwelling minute organ- 

 isms; oocyst with 4 sporozoites. 



C. muris T. (Fig. 252, g, i). In the peptic glands of the mouse; both 

 schizogony and sporogony in the mucoid material on surface of the 

 epithelium: oocysts 7/x by 5ju; 4 sporozoites, 12-14/* long (Tyzzer, 

 1910). 



