516 THE INTESTINAL CANAL, BY E. KLEIN AND E. VERSON. 



in height towards the apex, is, as Kdlliker* has shown, incor- 

 rectly named, since it is composed exclusively of connective 

 tissue. 



The mucous glands of the human tongue occupy the sides 

 and root of the organ ; amongst the former are those described 

 by Blandirrf* and Nuhn.:}: 



Nuhn found at the apex of the tongue of Man, lying beneath 

 the mucous membrane and a layer of longitudinal muscular 

 fibres formed by the styloglossus and longitudinalis inferior, a 

 symmetrically placed pair of glands, from seven to ten lines long, 

 three to four and a half lines broad, and one and a half to two 

 and a half lines thick, opening by five orifices on the lower 

 surface of the apex. N. Ward once found at this point an 

 azygous gland, placed transversely, one-third of an inch broad, 

 and one-eighth of an inch long, with three fine excretory 

 ducts. 



On the lateral border of the tongue, near the styloglossus, 

 there may also be found a median and a more constant poste- 

 rior group of glands, which either open close to the edge of the 

 tongue, or more rarely in the floor of the mouth. 



The glands at the root of the tongue form, beneath the 

 posterior non-papillated portion of the mucous membrane, a 

 continuous layer of six millimeters in thickness, partly 

 imbedded in the musculature. || The excretory ducts of these 

 glands open, in the newly born infant, in the hollows between 

 the ridges ; but in adults, in some instances, in the so-called 

 crypts of the root of the tongue, which, according to Salter,1F 

 constitute reservoirs for the acinous glands. Many of these 

 reservoirs extend, according to this observer, as elongated, 

 sometimes branched, passages for one-half to three-fourths of 



* Beitrage zur Anatomic der Mundhohle, Wurzburger Verhandlung, 

 Band ii., p. 169. 



t Anat. topograph. Paris, 1834, p. 175. 



| A. Nuhn, Ueber eine lisjetzt noch nicht naher beschriebene Drilse im 

 Innern der Zungenspitze, " On a hitherto undescribed gland in the apex 

 of the Tongue." Mannheim, 1845. 



N. Ward, loc. cit. 



|| Henle, Splanchnologie, p. 141. 



H Todd's Cyclopcedia, Vol. iv., p. 1140. 



