THE LYMPHATICS 143 



skin, and the subsequent formation of a blood tumour or 

 hematoma. 



Septic inflammation of the vein, or Septic Phlehitis, may 

 follow as a complication due to infection at the time of opera- 

 ting, or subsequently. This leads to the formation of a thrombus, 

 which at first causes partial, but later complete obstruction of 

 the lumen of the vessel. It is indicated externally by a swelling, 

 which extends up the jugular furrow from the seat of operation. 

 Systemic disturbances arise, the temperature running up to 

 1 04°-! 05° F., the animal shows no inclination to move the neck, 

 and is the subject of anorexia. The method of treatment is to 

 cast the animal and apply two ligatures to the vein, one just 

 below the seat of operation, and the other above the superior 

 limit of the elongated swelling. The intermediate part of the 

 vein, with its contained thrombus, should then be carefully 

 excised. 



Febrifuges and antiseptics should be given internally, and food 

 requiring little mastication, in order that the movements of the 

 jaw may be restricted as much as possible. 



LYMPHATICS OF THE HEAD AND NECK 



All the lymph from the head and neck passes through the pre- 

 pectoral lymphatic glands, and towards these glands therefore all the 

 lymphatic vessels of this region are directed. 



The Prepectoral Glands. — The prepectoral glands are found at the 

 entrance to the chest on the deep face of the scalenus muscle, being 

 therefore quite close to the jugular confluent. They are related also 

 to the inner surface of the first rib. 



The efferent vessels from the submaxillary, pharyngeal, the pre- 

 scapular glands, and also from the chain of glands running along the 

 carotid artery, discharge their contents into the prepectoral glands. 



