DESCRIPTION OF PLATE I. 



Malarial Parasites. 



1. Two tertian parasites about thirty-six hours old, attacked blood corpuscles 

 magnified. 



2. Tertian parasite about thirty-six hours old; stained by Romanowsky's 

 method. The black granule in the parasite is not pigment but chromatin. 

 Next to it and to the left is a large lymphocyte, and under it the black spot 

 is a blood plate. 



3. Tertian parasite, division form nearby is a polynuclear leucocyte. 



4. Quartan parasite, ribbon form. 



5. Quartan parasite, undergoing division. 



6. Tropical fever parasite. (^Estivo-autumnal.) In one blood corpuscle 

 may be seen a smaller, medium, and large tropical fever-ring parasite. 



7. Tropical fever parasite. Gametes half moon spherical form. Smear 

 from bone marrow. 



8. Tropical fever parasite which is preparing for division heaped up in the 

 blood capillaries of the brain. 



Asexual Forms. 



9. Smaller tertain ring about twelve hours old. 



10. Tertian parasite about thirty-six hours old, so called amoeboid form. 



11. Tertian parasite still showing ring fever, forty-two hours old. 



12. Tertian parasite, two hours before febrile attack. The pigment is begin- 

 ning to arrange itself in streaks or lines. 



13. Tertian parasite further advanced in division. Pigment collected in 

 large quantities. 



14. Further advanced in the division. (Tertian parasite.) 



