394 THE NASAL REGION IN EUTAENIA, 
The nasal bones immediately succeed the ascending process of the 
premaxilla. They reach down between the wings of the nasal 
septum, and do not pass out farther than the superior border of 
Miiller’s Gland. Posteriorly, each have a process directed downward 
to unite with the process of the inner edge of septomaxillary, when 
the plate of the latter disappears beluind. (Fig. 4, 2a.) This inferior 
process is continued intu the rostrum of the frontal bone of the same 
side. 
In the same section as at first examined, viz., that through the 
middle of the Organ of Jacobson, the mucous membrane of the roof 
of the mouth differs in structure at the tollowing points : 
(a) At the inner surface of the lip, where large nucleated cells are 
overlaid by a corneous stratum; the cells at the base, while of the 
same size and shape, are more granular in contents. 
(3) in the immediate neighborhood of the furrow, in which the 
ducts of the upper lip gland open ; there the corneous layer is replaced 
by flattened, apparently squamous, cells overlying a layer of small 
oval cells. This is the structure of the membrane on the middle 
palate and in the dental pits. 
(y) In the palatine crypts, where goblet and ciliated cylindrical 
cells alone are found, the latter being to all appearance the more 
numerous. 
(0) At the passage from one palatine crypt to another, where the 
membrane is formed almost wholly of ciliated epithelium cells, with 
here and there a goblet cell. 
The furrow to be found limiting the inward extension of corneous 
layer of the lip receives at regular intervals the apertures of the 
ducts of the upper lip gland. From here the ducts lead upward and 
outward and break up into a number of acini. Immediately above 
the lobule thus formed are to be found the sections of preceding or 
succeeding lobules, three or four in number. The cells of the acini 
in the uppermost lobules are of larger size than those of the lower. 
The nucleus in each is generally situated in the outer half of each 
cell, the contents of which are more or less granular, and slightly 
pigmented, giving to the gland, as a whole, a yellowish tinge. When 
removed in a state of active secretion, the cells of the gland are found 
to be extremely granular. As these approach the main duct they 
elongate and become cylindrical. The acini are compressed against 
each other, thus becoming polygonal in section and are separated by 
small quantities of nerve fibres and connective tissue. 
