THE ORAL CAVITY. 



55 



and to either side will be observed the sublingual folds, which project in varying degrees in differ- 

 ent subjects. These folds are due to the upper margins of the sublingual glands, and to their 

 inner side the submaxillary ducts may be exposed (for the extraction of salivary calculi, for ex- 

 ample). The posterior portion of the sublingual gland lies upon the mylohyoid muscle, while the 

 remainder of the gland is closely related to the inner surface of the mandible, where it produces 

 the sublingual fossa of varying depth. The numerous invisible orifices of the gland are situated 

 upon the sublingual folds. The sublingual gland frequently possesses a larger duct [ductus 



^ BICUSPID 



1" MOLAR 

 r MOLAR: 

 3- MOLAR 



OPENING""! 



OF 5TENOS 

 DUCT. 



LINE OF 

 INCISION! FO 

 PERITONSILL 

 AB5CE55E5. 



FLOOR OF MOUT 



RANINE ARTERY 



JUNCTION OF 

 r HARD AND SOFT 

 PALATES. 



UVULA- 

 POSTERIOR 

 r PILL AR. S FAUCES 



L- FAUCIAL TONSIL. 



FRAENt'M 

 LINGUAE 



OPENINGS OF . 

 6UBMAX/LLARY 

 AND 6UBLINGUAL 

 GLANDS. 



FIG. 20 A. View of adult mouth (modified from Spalteholz): M.I., Middle incisor; L.I., lateral incisor; C, canine tooth; 



ist Bic., first bicuspid tooth (Eisendrath). 



major Rivini or duct of Bartholin; according to Cunningham, this rarely exists in man. ED.] 

 which may unite with the submaxillary duct or have an independent orifice. The opening of the 

 submaxillary duct (Wharton's) may be recognized, with the naked eye, in the sublingual caruncle 

 at the anterior extremity of the plica sublingualis. [This duct and the lingual nerve lie beneath 

 and to the inner side of the sublingual gland; the nerve on its way to the tongue crosses the duct 

 on its inferior aspect opposite the anterior border of the hyoglossus muscle. ED.] 



