Plate E, 



Molt. Fig. I. 



Longitudinal section of vess?' rf brain of ox that died of Jinga infection. Trypanosonies in various modified 

 shapes are seen. Some of these may be amcjeboid forms of trypanosomes ; probably some are trypanosomes which 

 have been attaclced by leucocytes. Magnification 500. Stained in bulk — methylene blue and eosine. 



Fig. 2. 

 Small vessel of the medulla oblongata of rabbit inoculated with Surra. The animal died three months after 

 infection. Shows a plasmodial mass in the centre and trypanosomes in a whorl near by. Magnification i,oo<j. 

 Polychrome. 



".. V 





^..^' 





B 



r 



r^ 



I). 



Fig. 3. 

 Nerve cells of above, 

 showing chromotalysis, 

 and a small vessel with 

 the trypanosomes (/) 

 coiled up, blocking it. 

 Magnification 1,000. 

 Polychrome. 



(S 



'^O 



<^<-\ 



^>- 



t. Fig. 4. 



Somewhat similar appearances as in fig. 2, seen in longitudinal section of vessel. Numbers of chromatin rings, 

 probably macro-nuclei (A) ; (B) capillary blocked by trypanosomes; (C) trypanosomes in the tissue; (D) ganglion 

 cell, showing marked chromolytic changes, probably due to capillary obstruction. The nucleus is swollen and clear, 

 the body of the cell shrivelled, and there is an absence of Nissl granules. Magnification i ,000. Romanowsky. 



A Kf'Uey del 



Bale 8;I)faiiels60ii,L'^ litV 



