538 



PRINCIPLES OF VETERINARY SURGERY 



postei-ior aorta and completely obstruct the rectum. In the 

 thorax, tumors have been found in the mediastinum, around 

 the trachea and along the oesophagus. The submucous tis- 



FiG. 61. 

 Peritoneal Melanosis Localized on the Large Intestines. 



sue of the larynx and the soft palate may be invaded. The 

 serous membranes, — the pleura, the peritoneum and the per- 

 icardium, — show round or irregular black patches, more or 

 less thick, more or less .numerous, and scarcely larger than 



