io8 



PROTOZOA AND DISEASE 



Inside this zone of mitosis the chromatin gradually disappears, and 

 highly refracting globes, etc., are alone found. Such areas are the 

 same as those just referred to in the picro-carmine-stained sections, 

 and they contrast with the necrosed areas e.g., Fig. 41 ; /. 



The rest of the surface of sections of this tumour is occupied 

 with the round sarcoma-cells (Fig. 41 ; 3), the clear nuclei of which 

 alone show plainly, and are represented by faint circles. Among these 



FIG. 42. SARCOMA OF TESTIS. (Camera drawing ; x 800 diameters.) 



i, Intracellular parasite ; 2, free parasite ; 3, large cell in mitosis ; 4, tumour- 

 cells ; 5, connective-tissue cells. 



areas occur, in groups or singly, cells like those described above as 

 forming the outer zone of the highly refracting areas, and the whole 

 area is intersected by bands of connective-tissue fibres (Fig. 41 ; 4). 

 Examined under a magnifying power of 800 diameters, the elements 

 of the tumour appear as shown in Fig. 42. The nuclei of the bulk 

 of the cells those indicated by 3 in Fig. 41 and 4 in Fig. 42 

 are seen to have a nucleus poor in chromatin, and containing an 



