PLATE 7 



EXPLANATION OF FIGURES 



77 Portion of a trophozoite showing parts of several pansporoblasts and one 

 gemmule. 



78 Portion of trophozoite containing a pansporoblast. There are only eleven 

 nuclei in the section the twelfth being in the adjoining section. 



79 Portion of trophozoite containing parts of two pansporoblasts. Note 

 that the cytoplasm of the pansporoblasts stain deeply while the cell outlines are 

 very difficult to distinguish. 



80 Nearly mature spore. All the nuclei in the spore are shown. 



81 and 82 Each figure shows two spores formed from the same pansporoblast. 

 Slightly later stage than in figure 80. All the nuclei are shown. 



83 Portion of sporulating trophozoite in which the cells of the pansporoblast 

 have become definitely arranged to form spores. Drawn from a dried smear 

 stained by Giemsa's method. X 1400. 



84 to 89 Different stages in sporoblast cells of the polysporous form. 



84 Prophase. X 2650. 



85 Side view of metaphase. X 2650. 



86 and 87 Polar views of equatorial plates showing six chromosomes in each 

 case. X 2650. 



88 Anaphase. X 2650. 



89 Telophase. X 2650. 



376 



