PUS IN THE GUTTURAL POUCHES 



505 



H 



Fig. 204. Transverse Section of Horse's Head, showing the Guttural Pouches 



A, Brain. B, Maxillary Condyle. c, Sphenoid Bone. D, D, Guttural Pouches. E, Great Cornu of Hyoid. 

 Bone. F, F, Eustachian Tubes. G, (Esophagus. H, H, Parotid Glands. 



certain conditions, notably when the head is held low, as in eating and 

 drinking from the ground. During mastication coughing is induced in the 

 act of swallowing, when 



the pellet of food is some- 

 times expelled from the 

 mouth into the manger. 

 In some cases of this kind, 

 where post-mortem ex- 

 amination has been made, 

 the pus has been found 

 to have formed itself into 

 numerous solid concretions 

 varying in size from a pea 

 to a walnut, some being 



rounded, others angular and faceted masses (fig. 205). In structure all 

 are laminated or formed in layers. 



Fig. 205. Concretions of Pus from the Guttural Pouches 



VOL. I. 



34 



