PLATE I. 



STAINED WITH LEISHMAN'S STAIN. 

 Figs, 

 i to 5. Stages of benign tertian parasite. Plasmodium vivax. 



6. Gametocyte benign tertian. 



7, 8, 9. Characteristic degeneration of red corpuscles con- 

 taining benign tertian parasites (Schuffner's 

 dots). 



10 to 15. Stages of quartan parasite. Plasmodium malaria:. 

 1 6, 17. Stages of malignant tertian (sub-tertian) which 

 are seen in peripheral blood. Plasmodium 

 falciparum. 



18. Male gametocyte, malignant tertian (sub-tertian). 



19. Female gametocyte malignant tertian (sub-tertian). 



20. Double infection with malignant tertian (sub- 



tertian) parasites of a red corpuscle ; baso- 

 philic granules in red corpuscle. 



21. Spirillum of relapsing fever (stained with carbol 



fuchsin). 

 22, 23. Amoeba coli. 



