1 68 MARTINI. 



PLATES HI TO VI. 



Magnification in figs. 1 to 17 and 20 to 34, 1,000 diameters. Magnification in 

 fig. 18, 1,250 diameters, in fig. 19, 4.50 diameters. The photographs 

 were made by Mr. Charles Martin,- photographer of the Bureau of 

 Science. Preparations stained by Giemsa's solution. 



Plate III. 



Fig. 1. Narrow forms of the piroplasmata in fresh blood smears from the 



"original calf" made on January 18, 1909. 

 Pig. 2. Ring form in fresh blood smear from the "original calf" made on January 



18, 1909. 

 Pig. 3. Binuclear form in a fresh blood smear from the "original calf" made on 



January 27, 1909. 

 Pig. 4. Double binuclear form from a fresh blood smear from the "original calf" 



made on February 16, 1909. 

 Pig. 5. Cross form from a fresh blood smear from the "original calf" made on 



January 18, 1909. 

 Pig. 6. Arrow form from a fresh blood smear from the "original calf" made on 



February I, 1909. 

 li'iG. 7. Form resembling a trypanosoma from a fresh blood smear from the 



"original calf" made on February 1, 1909. 

 Pig. 8. A form lying outside of the red blood cell in the fresh centrifugated blood 



from the "original calf." 

 Pig. 9. Rare form of trypanosoma from the bouillon culture from the "original 



calf" made on January 23, 1909, seen on January 25, 1909. To the 



left, below is seen an indication of the uudulatory membrane ; at the 



left a sliglit club-like swelling indicates the flagellum. 

 Pig. 10. Division form of a trypanosoma from tlie blood culture from the "original 



calf" made on February 5, 1909, seen on February 8, 1909. 

 Pig. 11. A small, well-developed trypanosoma from the bouillon culture of the 



"original calf" made on January 18, 1909, seen on January 20, 1909. 

 I!'IG. 12. A large well-developed trypanosoma from the blood culture of the 



"original calf" made on January 23, 1909, seen on January 25, 1909. 

 Pig. 13. Very slender trypanosoma prepared the same day from the same culture as 



in fig. 12. Perhaps a male individual ; compare with Prowazek's 



illustrations {Studiem iiber Siiugetiertrypanosomen ( 23 ) ) . Fig. 37. 



Plate IV. 



Fig. 14. Form showing beginning division; prepared fi'om the same culture on the 

 same day as fig. 12. The blepharoblast shows a contraction in the 

 middle, and the nucleus is drawn out in the direction of the long 

 diameter of the parasite. In one of the red blood cells is seem a 

 persisting piroplasma. 



Fig. 15. Continuation of the process of division; two flagella are now visible; 

 preparation made the same day and from the same culture as fig. 14. 



Pig. 10. Continuation of the process of division made on February 5, 1909. 

 Daughter cells, on the point of separating; from a bouillon culture 

 of the "original calf" seen on February 8, 1909. 



Flos. 17 and 18. Groups of trypanosomata from the same culture made on Jan- 

 uary 23, 1909, seen on January 25, 1909. In fig. 18 the magnification 

 is about 1,250 diameters. 



