418 ON BLOOD- PARA SITES. 



Fig. 3. Spirochetes in the blond of a Green Monkey. X 1000. 



The monkey had also malaria (not shown). 

 F'ig. 4. Tiypanosomes in the blood of a Dial Bird. They are large and thick : 



the one marked a is prohablj^ degenerating, and that marked h is of a 



different shape and stained inore easily. 

 Fig. 5. Intestinal organism of Trichomonas type in the blood of a Leopardine 



Snake. x'lOOO. 

 Fig. 6. Intestinal organisms of Hexamitus type in the blood of a Bull Frog. 



Pl. L. 



Fig. 7. Filariae in the blood of a Pinche Marmoset. X 135. Present in verj- lai'ge 



nnnibers. The capsule is not distinguishable. 

 Fig. 8. Haimogregarines in the blood of a Hog-nosed Snake. X 500. 



A very severe infection, nearly every erythrocyte contained one or more 



parasites. At a parasites which have escaped from the erythrocytes and 



are free in the blood are seen, and at h a cell containing so-called male 



and female forms. 



Pl. LI. 



Fig. 9. A drawing of various forms of the same Hexamitus type of organism of 



vi'hich a photograph is shown on PI. XLIX. fig. 6. 

 Fig. 10. A scale-drawing of the Hsemogregarine found in the blood of a Hog-nosed 



Snake, of which a photograph is given on PI. L. fig. 8. 



a. An erythrocyte containing two parasites of so-called male and 



female types, h. Two parasites free in the blood, one hyaline, the other 



very granular, c. Schizogony ; two cysts from the lung. d. Also from 



the lung ; probably an earlier stage than c. 

 Fig. 11. A scale-drawing of Hgemogregarines in the blood of a Black Snake. At 



a are two parasites joined together by the remains of the nucleus of the 



erythrocyte, h points to a number of probable ookinete forms found 



in the stomach of a tick found upon the snake. 

 Fig. 12. Ha^mogregarines in the blood of a Rat-tailed Serpent. X 500. This is a 



late stage of the infection, showing the parasites attached to the remains 



of the nuclei of the erythrocytes. 

 Fig. 13. H«mogregarines in the blood of a Mexican Snake. X 300. At a can be 



seen infected erythrocytes which are enormously enlarged, very much 



thinned, and entirelj' dehajmoglobinised. 



Pi,, lit. 



Fig. 14. Drawing of Ha^nogi'egarines from the blood of a Black-spotted Lizard. 

 Showing enlargement of the corpuscles and the .various forms assumed 

 by this parasite. At a is an erythrocyte very much enlarged and altered 

 in shape and texture, and vacuolated. At h are two free forms, showing 

 considerable nuclear activity and ver^' gi-anular protoplasm. 



Fig. 15. An erythrocyte from the bone-marrow of the same Black Snake to which 

 Fig. 11 refers. X 750. It contains two hsemogregarines of the so-called 

 male and female type. 



Fig. 16. Drawing of Hsmogregarines from the blood of a Madagascar Boa. En- 

 larged cells containing one and two parasites. At a is a cyst from the 

 lung, showing commencing schizogony. 



Fig. 17. Drawing of a leucocytozoon from the blood of a Scaup's Duck. At a are 

 deformed erythrocytes containing the parasite ; at h remains of nuclei of 

 erythrocytes ; at c a raacrogamete ; and at d probably a microgamete. 



Pl. LIII. 



Fig. 18. Blood of a Brazilian Hangnest, showing infection with Plasmodium. 



prcecox. X 450. Many of the infected cells show a multiple infection 



as at a. 

 Fig. 19. Blood of a Crowned Crane showing the same parasite as Fig. 18. The 



blood is very anemic. There are single and multiple infections of the 



erythrocytes, and at a is a parasite breaking up into a rosette. 



