MOUTH. 



509 



surface. The papillae circumvallatae alone have a relation to 

 the sense of taste. The tongue is supported by the hyoid bone 

 and by a cartilaginous rod, which represents the os interglossum. 

 The anterior cornua of the hyoid are attached by ligament to 



V 



Nm 



Fio. 267. — Entrance to the digestive apparatii^tind the respiratory organs of the cat (after 

 C. Haider), a head with exposed salivary glands. P parotid ; M sub-maxiUary ; Su 

 sub-lingual. 6 Longitudinal seotion through the head and thorax ; the respiratory organs 

 are seen from the side, c Longitudinal section through the larynx ( L) and the first part 

 of the trachea (Tr.). B thymus; C corpus callosum ; Cb cerebellum; Cg corpora quad- 

 rigemina ; D Diaphragm ; E epiglottis ; H cerebral hemispheres ; Hy hypophysis ; L 

 larynx ; M mouth ; N nasal aperture ; Nm turbinal bones ; Oe oesophagus ; P lung ; 

 Pa velum palati ; R spinal cord ; S vocal cord ; St sternum ; T thyroid ; Tr trachea ; 

 Tu opening of eustachian tube into the pharynx ; W vertebral column ; Z tongue ; Zb 

 hyoid. 



the styloid processes of the temporal bone or its equivalent, the 

 posterior bear the larynx. Beneath the tongue there is some- 

 times (most developed in the Insectivora) a single or double 

 projection, which is termed the sublingua. The sides of the 

 buccal cavity are soft and fleshy, and are not unfrequently in 



