5 i8 



APPENDIX C. 



the fully developed amoebulae before sporulation, whereas in the malig- 

 nant type they have a characteristic crescent-like or sausage-shaped 

 form ; hence they are often spoken of as " crescentic bodies." 



FIG. 157. 



FIG. 158. 



FIG. 159. 



FIG. 160. 







o 



4 



FIG. 161. FIG. 162. 



FIGS. 157-162. Various phases of the benign tertian parasite. 



Fig. 157. Several young ring-shaped amoebulae within the red corpuscles, one of the latter en- 

 larged and showing a dotted appearance. Fig. 158. A larger amcebula containing pigment granules. 

 Fig. 159. Two large amoebulae, exemplifying the great variation in form. Fig. 160. Large amcebulse 

 assuming the spherical form and showing isolated fragments of chromatin preparatory to sporulation. 

 Fig. 161. Sporocyte, which has produced eighteen spores, each of which contains a small collection of 

 chromatin. Fig. 162. A number of spores which have just been set free in the plasma, x 1000. 



The various forms of the parasite seen in the human blood may now 

 be described more in detail. 



