PLATE I 



Fig. I. — Simple tertian parasite. Fresh preparation. 



I and 2. Young forms, pigmented, actively amoeboid, 

 3. Ldrge form with 'boiling' pigment. Corpuscle 

 much enlarged. 



Fig. 2. — Simple tertian parasite. Romanowsky stain. 



I and 2. Young and medium size forms, shewing 

 stippling of the red cell (SchiiEner's dots). 



3. Female gamete, with much stippling of red cell. 



4. Segmenting stage. 



Fig. 3. — Malignant tertian parasite. Fresh preparation, 



1. Young parasites. Horse-shoe forms. 



2. Mikrogametocyte (male crescent). 



3. Makrogamete (female crescent). 



4. Oval stage of crescent. 



5. Spherical stage of crescent. 



Fig. 4. — Malignant tertian parasite. Romanowsky stain. 

 I and 2. ' Ring ' forms. 



3. Large egg-shape form. 



4. Large form shewing coarse stippling of red cell. 



5. Segmenting form. Very rare in peripheral blood. 



Fig. ^. — Quartan parasite. Fresh preparation. 



1. Medium size. 



2. Large size. 



3. Presegmenting form. 



4. Segmenting, daisy, or marguerite form. 



Fig. 5. — Quartan parasite. Romanowsky stain. 

 I and 2. Young forms. 



3. Large form. 



4. Segmenting form. 



5. Mikrogametocyte ( ^ ). 



