478 DIGESTIVE SYSTEM OF THE PIG 
palate, 7. e., it is nearly horizontal. It extends to the middle of the oral surface 
of the epiglottis. It has in many cases a small median prolongation termed the 
uvula. The oral surface presents a median furrow, on either side of which is an 
oval raised area, marked by numerous crypts; these elevations are the tonsils. 
Tonsillar tissue also occurs in the lateral walls of the isthmus faucium and the root 
of the tongue. 
The tongue is long and narrow and the apex is thin. Two or three vallate 
Fic. 411.—Harp Parare or Youne Pia. Fic. 412.—Toneve oF Pie. 
1, Papilla incisiva; 2, openings of ductus in- 1, Apex; 2, dorsum; 3, root; a, orifices of ducts of 
cisivi; 3, raphé of palate; a, incisor teeth; 5, canine lingual glands; 6, papille of root; c, vallate papilla (not 
tooth; c, premolar teeth; d, molar teeth- really so distinct as in figure); d, foliate papilla; e, fungi- 
form papille; /, epiglottis (pulled back); g, median glosso- 
epiglottic fold. (Ellenberger-Baum, Anat. d. Haustiere.) 
papillae are present. The fungiform papille are small and are most numerous 
laterally. The filiform papillee are soft and very small. On the root there are 
soft, long, pointed papille, directed backward. Foliate papillze are also present. 
There is a well-marked median glosso-epiglottic fold, on either side of which is 
a depression (Vallecula epiglottica). The frenum lingue is double. 
The dental formula! of the pig is: 
3) dea 3 
2{ I-C-P-M- }= 44 
3: lee es 
1 Several figures in the osteology also illustrate the teeth. 
