Contributions to the Histology of Brady pus tridactylus. 41 
across a fold exhibits two strata of glands separated by a corium 
containing capacious thin-walled blood-vessels, and muscular and 
elastic tissues. The glands are cut through in different planes, 
and appear as rods of cells, long ducts or circles according to the 
plane of section. The cubical gland cells have many granules, 
and their nuclei take on chromatin dyes very intensely. Some of 
the gland tubes are simple, but others are bifurcated, and they 
abut against a well-marked muscularis mucosae. 
Text-Fig. 6. — Structure of the cardiac stomach, a , mucous 
membrane ; b, stratum corneum ; c, muscular coat. 
The cwcal appendage (text-fig. 5) is long and tapering, and its 
lumen is bisected by a septum in the upper part. In the greater 
part of its length the mucosa is thrown into six longitudinal folds. 
Its glands (a) resemble those in the paunch, and its muscularis 
mucosae ( c ) is likewise well developed. The muscular coat (b) is 
Text-Fig. 7. — Structure of the pyloric glandular region (fig. 2, E). 
strong and sends processes into the core of the rugae. The re- 
mainder of the extra-muscular layer contains much connective 
tissue and many thin-walled blood-vessels. Lying among the 
glands are aggregated lymphoid cells (d). 
The cardiac stomach (text-fig. 6), which is derived from the 
cesophagus, is divided into three compartments, whose histological 
characters differ. But in all the submucous connective tissue (a) 
is loose and thick. The epithelial layers, especially the superficial 
