10 Emil Goetsch. 
The character of the mucous cells of these glands is well shown 
in Fig. 8 and requires no special description. ‘Their secretory con- 
tent stains selectively in muchematein. 
The crescents (Figs. 8 and 4) are composed of cells which stain 
intensely in eosin. In the glands of the upper portion of the cesoph- 
agus they are to be found forming the characteristic crescent- 
shaped groups at the ends or along the sides of tubules. In the 
lower glands they form aggregates of considerable size, often sur- 
rounding a lateral diverticulum of the lumen of the gland so as to 
make a sort of sessile acinus on the side of a tubule. The character 
Duct epithelium 
Demilune 
Denvilune 
Iie. 4. Portion of duct of cesophageal gland from lower end of cesophagus 
of Didelphys showing demilune cells alternating with duct epithelium. < 500. 
of the cells is the same at all points in the esophagus. They are 
cuboidal in shape and the aggregate presents a rather remarkable 
resemblance to the parietal cells of the gastric glands. The cytoplasm 
is finely granular, but the granules are less crowded than in the 
parietal cells. Between the constituent cells of the complex, in iron 
hematoxylin preparations, may be seen fine intercellular secretion 
canaliculi, their outlines defined by fine cement lines. In Mal- 
lory preparations the granules along the canaliculi and on the lumen- 
border of the cell stain differently from the fine granules of the 
cytoplasm and probably represent the secretion antecedent of these 
