652 



PRINCIPLES OF VETERINARY SURGERY 



centimeters. The superior as well as the inferior incisors 

 are well developed. The superior molars project outward 

 and the inferior arcades are vertical and prominent, and 

 press against the enlarged palate. In profile the palate in 

 its arched condition resembles a prow or the sole of a shoe. 

 The patients find difficulty in breathing. The air can 

 scarcely pass through the nasal cavities and causes the char- 

 acteristic sniffling sound loud enough to be heard at some 



Fig. 110. 



Hog's Head Enlarged Inferiorly 



(Mathis and LeBlanc) . 



Fig. 111. 



Hog's Head Showing Bulging of the 



Palate. 



distance. Expiration occurs through the mouth. The 

 movement of the ribs is difficult, and is out of harmony with 

 that of the flanks. From time to time seizures of suffoca- 

 tion occur, during which the respirations are carried on only 

 through the mouth. 



As a consequence of imperfect haematosis the skin and 

 mucous membranes become cyanotic, and although death 

 may seem near at hand calmness is restored after a few 

 hours and the skin again resumes its normal color. In many 

 cases the capacity of the mouth is so reduced that the 



