402 PROCEEDINGS OF THE CANADIAN INSTITUTE. 
scattered connective tissue corpuscles. It never separates with the 
gland from the mucosa. 
The relation of the capillaries to the various portions of the fish’s 
stomach has been pretty accurately described by Melnikow for Lota 
vulgaris. These vessels in Amiwrus present no difference from the 
given description, except in their connection with the glands. The 
following description must, therefore, follow Melnikow’s! to a great 
extent. 
The arteries of the mesenteric coat become divided into two or 
more branches, which pass between the longitudinal muscle bundles, 
the proper vessels of which are accompanied by venous capillaries. 
The greater branches run into the circular layer between whose 
bundles they pass to the submucosa. The outline of the vessels 
formed around these bundles is generally quadrate. In the sub- 
mucosa the arterial branches take an upward and a backward course 
toward the muscularis mucosae. Those distributed to the base of a 
crypt or suleus immediately pierce the muscularis, within which they 
run parallel to the surface and then in between the base of the 
glands. Arteries of large diameter in the submucosa run parallel to 
the surfaces of the folds, and give off branches which ascend into the 
extreme summit, each of which again in the immediate neighbour- 
hood of the mucularis muscosae divides into two or three smaller 
branches. These latter pierce the muscularis mucosae and then 
break up into a number of very fine twigs, which ascend between 
the glands and parallel to them. Each of these give off to the 
others near it a transverse twig, and in this manner arise a polygonal 
often an hexagonal tield when the glands are viewed in transverse 
section. As many as ten or twelve transverse bands may surround 
a gland. When they reach the base of the epithelial layer and the 
base of the crypts they run very close to these and pass over into 
venous capillaries which collect gradually into ones of still greater 
size till they reach the submucosa. 
MIDGUT. 
The folds of the mucous membrane are highest in the neighbour- 
hood of the pyloric valve and appear most distinctly in villi-like 
prominences. Such a view is not always obtainable, only so in the 
1 Ueber die Verbreitungweise der Gefiisse in den Hiauten des Darmkanals der Leta vulgaris. 
Archiv fiir Anat. und Physiol. 1866. 
