PLATE XX 



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A. C. bTKTEliSON 



CocciDi'osis OF Intestine in Goat 



1. Portion of villus with nearly every cell infected. On the right, young niacrogameiocytes with two young microganietocytes about 



centre. On the left, nearly adult macrogametocytes. 



2. Macrogametocytes and one microgametocyte with nearly adult mJcrogametes in centre. 



3. Two niicrogainetocytes showing arrangement of microgametes around two centres of residual protoplasm. Al^o two macrogame- 



tocytes with cyst already formed round them while still in host cell, evidently before fertilisation as karyosome is still present. 



4. Nearly adult microgametes showing karyosome still attached to one end. 



Photogi-aphed unth Zeiss 2 ///;«. lens and camera length ,y 50 cm. Figs. 1, 2 and 'A ivith No. 4 compensating ocular and fig. 4 



7vith No. 8 compensating ocular. 



