N. H. SWELLENGREBEL 
861 
This hypertrophy of the connective tissue is probably to be regarded 
as a protective reaction against the invasion of the trophozoites. It is 
only to be seen where few parasites are present: around large accumu¬ 
lations of trophozoites (Diagrams I, III) no such hypertrophy was 
observed. 
Diagram XX. (Magnification of Diagram I.) Multinucleate giant-cells in an area of 
diffuse infiltration. 
In areas of diffuse infiltration large multinucleate giant-cells are to 
be found, but they are generally absent where the spores are formed 
within cysts. These giant-cells may contain 2-15 nuclei and attain 
dimensions of 28-43 (Diagrams XIX, XX). 
Parasitology iy 
24 
