THE NASAL REGION IN EUTAENIA. 395 
The gland extends from the transverse prenasal wall to a point 
immediately behind the fleshy union of the jaws. The lobules are 
larger and reach higher as they are followed backward. 
A large gland fills up the space between the cartilaginous prenasal 
wall and the apex of the snout. It is termed the “snout gland,” and 
and is shown by Reichel to be but a separately developed portion of 
the upper lip gland. Its ducts open in the depressions placed 
laterally from the head of the palatal crest. This shows it to be a 
paired gland, but the acini of lobules from one side are directed in 
every manner amongst those of the other side; as Reichel 
points out, they are quite separate at an early stage. The cellular 
structure is very similar to that of the upper lip gland, and possesses. 
also the yellowish tinge. The lobules reach up nearly to the posterior 
end of the ascending premaxilla. 
The Nasal Gland of Miiller is situated on the lateral wall of the 
nasal cavity, from which it is separated by the turbinal cartilage, 
and the septomaxillary ; as already described, it conforms itself to a 
concavity on the outer face of turbinal cartilage. As the concavity 
deepens to form a tube, a portion of the gland is included in it to its 
blind termination. It does not reach farther behind than the 
turbinal ingrowth, and anteriorly than the Organ of Jacobson. 
The «duct, however, is continued, first on a level with the tur- 
binal ingrowth, then on the lower outer surface of the nasal wall, 
which position it keeps till it reaches the anterior nasal opening, on 
the lower posterior edge of which is found its flask-like aperture. 
Fig. 7 is a representation of a transverse section at this point, with 
ap the aperture over a broad groove, which in front of this forms the 
floor of the nasal cavity. 
The cells of this gland are provided with large distinct nuclei and 
a protoplasm but little granular and staining very deeply. Their 
shape is generally cubical, approaching to cylindrical. The acini are 
arranged in horizontal layers separated by connective tissue, nerve 
fibres and capillary vessels, and are perfectly circular in transverse 
section. The main duct is continued behind, about the centre of the 
gland. 
The mucous membrane lining the floor of the nasal passage is. 
folded in a remarkable manner, reaching out into and narrowing its 
lumen ; its constituents are ciliated cylindrical cells and goblet ceils. 
Below these is found a layer of cells whose characteristics change: 
