360 
Pleistophora (jufantea, Thelohan 
No polar capsule was to be seen in the spores and no polar lilaraent 
could be demonstrated by the ordinary methods (see Material and 
Methods). The spores are 4'4-3’6 /a long and 3'4-4'6 fx broad. 
(e) Diffuse infiltration. It has been already stated that the spores 
are not always to be found situated within cysts; at times they are 
spread throughout the connective tissue (Plate XVIII, fig. 4; Diagram 
XIX). These spores are pi’obably produced by individuals which do 
not aggregate and encyst but I have been unable to ascertain if this 
is the case, never having observed non-encysted individuals in the act 
of sporulation. 
(_/) Reaction of the host’s tissue against the parasitic invasion. 
I have already described how the trophozoites are sometimes sur¬ 
rounded by a thick capsule of connective tissue (Diagrams IV, V, VI). 
Diagram XIX. (Magnification of Diagram I.) Diffuse infiltration of spores. 
