ALIMENTARY CANAL AND ITS APPENDAGES 401 



sense of taste; it is attached by its root to the hyoid bone. On its 

 upper surface are numerous small eminences or papilla, such as are 



Fio. 127. Section through a premolar tooth of the oat still embedded in ita 

 socket. 1, enamel; 2, dentine; 3, cement; 4, the gum; 5, the bone of the lower 

 jaw; c, the pulp-cavity. 



found more highly developed on the tongue of a cat, where they 

 may be readily felt. On the human tongue there are three forms 

 of papilla, the circumvallate, the fungiform, and the filiform. The 

 circumvallate papillae, 1 and 2, (Fig. 128) the largest and least nu- 

 merous, are from seven to twelve in number and lie near the root of 

 the tongue arranged in the form of a V with its open angle turned 



