DESCRIPTION OF PLATE II. 



Malarial Parasites. 



15. Complete division of the parasite. Typical mulberry form. 



16. To the left is the completed division form, an almost developed gamete, 

 which is to be recognized by its dispersed pigment. 



17. A tertian ring parasite, small size broken up. 



18. Three-fold infection with tertian parasite. The oval black granules 

 are the chromatin granules. 



19. To the left, tertian parasite with large, sharply demarked, and deeply 

 colored chromatin granules. To the right, tertian parasite. Both thirty- 

 six hours old. Both probably gametes. 



20. Tertian parasite thirty-six hours old, ring form. 



21. Tertian parasite with beginning chromatin division, with eight chromatin 

 segments. 



22. Tertian parasite chromatin division farther advanced with twelve chrom- 

 atin granules, in part triangular in form. 



23. Completed division figure of a tertian parasite. Twenty-two chromatin 

 granules. 



24. The young tertian parasites separating themselves from each other. 

 The pigment remains behind in the middle. 



25. Quartan ring parasite, which is hard to differentiate from large tropical 

 ring or small tertian ring. 



26. Quartan ring lengthening itself. 



27. Small quartan ribbon form. 



28. The quartan ribbon increases in width. The dark places consist almost 

 entirely of pigment. 



