Benson A. Cohoe Ue 
iron hematoxylin. In these Golgi preparations the cells of the granular 
area were found invariably lying next to an intercalated duct. They, 
in turn, were constantly succeeded by a group of clear, non-granular 
cells, occupying a distal position in the tubule. 
The intralobular ducts of this gland are lined by a single layer of 
epithelial cells of a high columnar type. This layer rests upon the base- 
ment membrane, outside of which there is a scanty amount of connective 
tissue. The nuclei of the cells are large and spherical and occupy a 
position central in the cell. A well-marked nucleolus is present, but 
the chromatin is less abundant than in the nuclei of the gland cells. 
The cytoplasm is abundant and stains readily with acid dyes. Towards 
the base of the cells it is arranged in the form of longitudinal striations, 
Fic. IV. A gland alveolus, with its accompanying intercalated duct leading 
into an intralobular duct. Preparation stained in iron-alum hematoxylin. 
Leitz Homog. Imm.1/12. Oc. 4. 
giving rise to the “rodded” variety of cell constituting the “ salivary 
tubes,” described by Pfliiger, who believed that this form of cell was 
actively concerned in the secretory processes of the gland. In an ex- 
hausted gland, after prolonged stimulation, the cytoplasm is observed 
to stain more feebly than in the resting gland. Large secretion granules 
are never found in these cells, but the cytoplasm itself manifests a finely 
eranular appearance. 
The ductules, or intercalary ducts, open into the intralobular ducts, 
obliquely or at right angles, with an abrupt change from the low, flat 
cubical cell of the ductule to the high columnar, rodded cell of the intra- 
lobular duct. (Fig. IV.) The cells are elongated in form, contain but 
little protoplasm and are devoid of granules. The reaction of the 
