







FIG. 154. 



FIG. 155. 







FIG. 156. 



FIG. 157. 



, 





t* 



FIG. 158. FIG. 159. 



FIGS. 154-159. Various phases of the benign tertian parasite. 



Fig. 154. Several young ring-shaped amcebulae within the red corpuscles, one of the 

 latter enlarged and showing a dotted appearance. Fig. 155. A larger amcebula con- 

 taining pigment granules. Fig. 156. Two large amoebulse, exemplifying the great 

 variation in form. Fig. 157. Large amcebula assuming the spherical form and showing 

 isolated fragments of chromatin preparatory to sporulation. Fig. 153. Sporocyte 

 or schi/ont, which has produced eighteen spores, each of which contains a small 

 collection of chromatin. Fig. 159. A number of spores which have just been set 

 free in the plasma, x 1000. 



