S, Sublingual ganglia.
The sublingual ganglia are not lettered.
The sublingual is represented by a mass of glands lying just beneath the mucous membrane of the floor of the mouth on the side of the tongue, causing a distinct ridge, extending from the fraenum backwards, the numerous ducts opening separately along the summit of the ridge.
In the third generation Caspar Thomeson (1655-1738), son of Thomas, also taught anatomy at Copenhagen, his name being associated with the description of one of the ducts of the sublingual gland and of the glandulae Bartholini, while his younger brother, Thomas (16J9-1690), was a student of northern antiquities who published Antiquitatum Danicarum libri tres in 1689.
Next in constancy are the " sublingual," closely associated with the last-named, at all events in the locality in which the secretion is poured out; and the " zygomatic," found only in some mammals in the cheek, just under cover of the anterior part of the zygomatic arch, the duct entering the mouth-cavity near that of the parotid.
The duct which runs along its upper and internal border passes forwards in the usual course, lying in the inner side of the sublingual gland, to open on the outer surface of a distinct papilla, situated on the floor of the mouth, half an inch from the middle line, and midway between the lower incisor teeth and the attachment of the fraenum linguae.