FIG. 16-3. 



FIG. 164. 



FIG. 167. 



FIG. 168. 



FIGS. 163-168. Exemplifying phases of the malignant parasite. 



FIG. 163. Two small ring-shaped amoebulae within the red corpuscles. Fig. 164. A 

 "crescent" or gamete showing the envelope of the red corpuscles ; also an amoebula. 

 Figs. 165-168 illustrate the changes in form undergone by the crescents outside the 

 body. In the interior of the spherical form in Fig. 167 evidence of the flagella can be 

 seen. Fig. 168. A male gametocyte which has undergone exflagellation, showing the 

 thread-like microgametes or spermatozoa attached at the periphery, x 1000. (The 

 figures in this plate are from preparations kindly lent by Sir Patrick Manson.) 



