426 



PROTOZOOLOGY 



D. scolelepidis R. (Fig. 193, d). In gut of Scolelepis fuliginosa; 

 zygote contents divide into 2 oval spores, 12-16^ by 6-10/x; spore 

 with 8 sporozoites. 



Genus Caryospora Leger Oocyst develops into a single spore 



Fig. 193. a, Isosporafelis, 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, X800 (L^ger); g-i, Cryptosporidium vutris 

 (g, h, oocysts; i, emergence of four sporozoites), X1030 (Tyzzer); 

 j, Pfeifferinella ellipsoides, X1330 (Wasielewski) ; k, P. impudica, X800 

 (L^ger and Hollande); 1, Lankesterella minima, a mature cyst in endo- 

 thelial cell, XlOOO (Noller); m, Barrouxia ornata, X1330 (Schneider); 

 n. Echinospora labbei, XlOOO (L6ger). 



with 8 sporozoites and a residual mass; membrane thick and yel- 

 low. One species. 



C. simplex L. (Fig. 193, e,f). In gut-epithelium of Vipera aspis; 

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



Genus Cryptosporidium Tyzzer. Lumen-dwelling minute or- 

 ganisms; oocyst with 4 sporozoites. 



C. muris T. (Fig. 193, g-i). In peptic glands of the mouse; both 



