ar 
cuticle, is made out with great difficulty; in a majority of cases it 
seems to be lacking at this stage. The gland in a stage during which 
the products of secretion are expelled (Fig. 1, No. 6), is markedly 
767 
Fig. 1, Series of stages showing the evolution of basal cells into active gland 
cells. 1. Basal cell lying near the base of the epidermis. 2, Basal cell at a stage more 
advanced than the preceeding, with upper limit of cell nearing the epidermis. 3. Fully 
formed gland cell, without visible pore canal, 4. Gland cell contents gathered into 
globules; and a well defined pore canal. 5, Cell contents in process of expulsion. 6. 
Late stage in the expulsion of cell contents. From absolute Aleohol and Haematoxylin 
preparation, 
different from this early condition. The cell walls are better defined, 
and more regular in outline; the cell is smaller than before, the 
transverse diameter being one-half to two-thirds its previous length. 
The nucleus is shrunken, of irregular outline, and takes a deep 
haematoxylin stain. The secretion is gathered into e deeply stained 
“mass in the center of the cell, this mass showing, by its irregular 
outline, that it is composed of many closely packed globules. 
Upon the cuticle above the cell, there usually appears a small 
amount of expelled secretion, with a fine projection leading from it, 
thro the gland opening, to the central mass in the cell beneath; here, 
as in the cell, the same deep stain is taken by the secretion. The 
portions of the cell not occupied by the secretion are unstained by 
the haematoxylin. Many glands are found in stages intermediate to 
the two discribed (Fig. 1, Nos. 4 and 5), and from these intermediate 
stages, can be selected a connected series leading from the first to 
the second described. These steps show a constant, though slight, 
