22 Emil Goetsch. 
are so large that they form small sessile acini along the sides of 
the tubules. In both cases intercellular capillaries are seen in iron 
hematoxylin preparations, outlined by cement lines running between 
the adjacent surfaces of the cells. In the acinus-like demilunes of 
the glands at the lower end these intercellular ductules open into a 
central lumen which is directly continuous with the lumen of the 
main tubule. Although the material was not suitable for studying 
the secretory content of the cells, because of the fact that the cesoph- 
agus was fixed in Zenker’s fluid fully an hour after the animal was 
Mucous cell 
ab Ness 
PU NL ete 
em oaths aay a 
¢ 
Serous 
acinus 
(demilune) 
Fic. 10. Portion of tubule of cesophageal gland of Procyon showing 
mucous cells and large demilunes with secretion granules. >< 500. 
killed, yet in some of the more superficial glands the cells of the 
demilunes contained well-fixed secretion granules (Fig. 10), which 
stained strongly in eosin and in iron hematoxylin and which occu- 
pied the portion of the cells bordering on the lumen. No basal 
filaments, however, were demonstrated. 
The ducts of the gland are lined for a very short distance at their 
origin from the lobule, by a low simple cubical epithelium. A short 
distance from its origin this changes to a two-layered epithelium, 
the cells of the surface layer having their long axes perpendicular 
to the basement membrane, those of the deep layer parallel to it. 
