STRUCTURE OF THE TOXGUE. 



699 



muscular fibres of which the chief substance of the organ 

 is composed. 



Fig. 202.* 



* Fig. 202. Papillar surface of the tongue, with the fauces and tonsils 

 (from Sappey). i, i, circumvallate papillae, in front of 2, the foramen 

 cajcum ; 3, fungiform papillre ; 4, filiform and conical papilla ; 5, trans- 

 verse and oblique ruga? : 6, mucous glands at the base of the tongue 

 and in the fauces : 7, tonsils ; 8, part of the epiglottis ; 9, median 

 glosso-cpiglottidean fold, frsenum cpiglottidis. 



