ON THE INFECTIVE GENITAL TUMOURS OF DOGS 



129 



shown in Fig. 50 only relatively few mitoses are seen, yet there are 



elongated or biscuit-shaped nuclei, pointing to direct division of the 

 cells. 



The more advanced part of the tumour (Fig. 51), when carefully 



FIG. 50. INFECTIVE TUMOUR OF DOGS: THE INITIAL STAGE. 

 drawing, low power.) 



(Camera 



A marginal portion of the lesion, Fig. 47 ; below is the normal fibrous tissue, which 

 gradually merges into the tumour tissue above. 



scrutinized under a high power, shows two striking protozoa-like 

 forms : (i) Dense oval or vermicular bodies of hyaline aspect and 

 without nucleus ; and (2) highly refracting multinucleated bodies 



9 



