EXPLANATION OF PLATE 3. 



Double tertian malaria. 



The character of the malarial parasites in the blood of Andres Mendez at the 

 time it was filtered. 



Stained with Goldhorn's polychrome methylene blue. 



1. Young ameboid forms. 



2. Older pigmented parasite. 



3. Young and old forms in the same field. 



4. 5, and 6. Segmenting forms. 



