DESCRIPTION OF PLATE I. 



Heematozoa of Tertian Malaria. 



FIGS. 1 to 4. . .Small ring-shaped merozoites of tertian malaria; 2 and 3, multiple in- 

 vasion of a single red cell. 



" 5 to 12 . .Amoeboid forms of gradually increasing size. 



FIG. 13 Large amoeboid form in which the pigment is beginning to collect as a 



preliminary to segmentation. 



" 14 Pigment still more clumped, and the pale areas representing nuclei be- 

 gin to be marked. 



" 15 Segmenting form with an irregular mass of merozoites. 



" 16 More symmetrical type of segmentation with central block of pigment. 



" 17 Free merozoites after leaving the red cell. 



" 18 Gamete. 



" 19 Micro gametocyte with flagella or microgametes. 



Haematozoa of Quartan Malaria. 



FIGS. 20 and 21 . . Small ring form of merozoites. 



" 22 to 25. ... Amoeboid forms with coarse pigment. 



" 26 " 28 Segmenting forms. 



" 29 Gamete. 



" 30 Microgametocyte with microgametes in the process of formation. 



Haematozoa of -SSstivo-Autumnal Malaria. 



FIGS. 31 to 34 . . Small ring forms, some of them on the surface of the corpuscle ; 32 and 

 33, multiple invasion of the red cell. 



" 35 and 36, Amoeboid forms found in the peripheral circulation. 



" 37 to 39 . . Large amoeboid forms and segmenting parasites found only very rarely 

 in the peripheral circulation, but abundantly in the spleen and bone 

 marrow. 



- 40 " 42 .. Young crescentic forms not found in the peripheral circulation, but 

 chiefly in the bone marrow. 



" 43 and 44, Adult crescents or gametes, found abundantly in the peripheral blood. 



" 45 " 46, Microgametocytes becoming oval and preparing to give off microga- 

 metes. 

 FIG. 47 Microgametocyte giving off microgametes. 



