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modifications of the peritoneum were described in relation to the 
support and connection of other viscera. The stomach consisted of 
two parts, a cardiac or membranous, and a pyloric or muscular part. 
The cardiac part is a subglobular cavity, measuring when distended 
9 inches in its longest diameter, 7 inches in depth from the cardia, 
to the left of which the cavity bulges about 4 inches. The circum- 
ference of the cavity is 18 inches. The pyloric part is 3 inches in 
both longitudinal and vertical diameter, 24 inches across; its mus- 
cular part is so thick that it may be called a gizzard: it has not how- 
ever the thick callous epithelial lining of a true ornithic gizzard. 
The lining membrane of the stomach, as compared with that of the 
cesophagus, becomes more vascular and is furnished with a thinner epi- 
thelium at the cardiac orifice; but the lining membrane for some 
distance from that orifice, and between it and the entry to the gizzard, 
is smoother and covered by a thicker layer of epithelium than in the 
rest of the cardiac cavity, where the ordinary vascular villous gastric 
surface prevails : the one modification passes insensibly into the other. 
When fully distended, the cardiac cavity is smooth ; as it contracts, 
the lining membrane falls into rugeze, very minute and irregular near 
the cardia, thicker and larger at the greater curvature, and assuming 
a longitudinal direction as they approach and converge towards the 
entry to the gizzard: at this part the folds were ten in number. In 
the distended stomach of the female Anteater the transverse diameter 
of the aperture was 1 inch 3 lines; its vertical diameter from 3 to 4 
lines; the distance from it to the cardia, 3 inches. 
In the smaller male Anteater, subsequently dissected, the gizzard 
was 2 in. 3 lines in length and 2 in. 9 lines in depth. 
Vertically and longitudinally bisected, the cavity of the gizzard 
appeared as a gently bent canal about a line in diameter, suddenly 
expanding near the pylorus to receive a valvular prominence from 
the upper muscular wall, which projected towards that opening. The 
vertical thickness of the muscular wall above the canal was 1 inch 
10 lines, below the canal 1 inch. 
In the female Anteater Prof. Owen divided the gizzard, previously 
injected and distended withalcohol. Whenthe gizzard was divided verti- 
cally and transversely the cavity presented a crescentic figure, with the 
horns directed upwards, on each side a large fleshy protuberance which 
descended into the cavity. On the lower part of the protuberance 
are three or four thick angular longitudinal ridges, which fit into the 
interspaces of similar ridges along the lower part of the cavity. The 
epithelium of the protuberance is thicker than that of the rest of the 
cavity, concealing in a greater degree, but not wholly, the vascula- 
tity of the subjacent injected membrane: the cellulo-vascular layer 
uniting the mucous with the muscular coats is most abundant at the 
walls of the gizzard opposite the protuberance. The thickness of the 
muscular wall, from the upper part of the gizzard to the bottom of 
the protuberance, is 2 inches, that of the lower wall of the gizzard 
6 lines: the difference of thickness here, as compared with the same 
part in the smaller Anteater’s stomach, is due to the more contracted 
state of the gizzard in the latter animal. 
