ve the velum palitinum, not shown here but shown in figure 7. Caudad
to these folds is seen the glottis, _gs_, a triangular opening with the
vocal cords, _vc_, at its base.

The mucosa of the inside of the pharynx and the anterior end of the
oesophagus, exposed by the dissection, is thrown into numerous
longitudinal folds, not shown in the figure; these well-marked folds
extend throughout the length of the oesophagus.

The oesophagus, _oe_, tapers gradually from the wide pharynx, _ph_, and
then continues as a cylindrical tube of uniform diameter to the right
side of the anterior end of the stomach, where it opens into the latter
organ. Its walls are thick, and its lumen is almost obliterated by the
longitudinal folds of the mucosa, mentioned above.

The stomach, _i'_, is oval in outline, though somewhat flattened
laterally; it is depressed, dorso-ventrally, to a little more than half
the lateral diameter. As has been said, the oesophagus enters its right
anterior border; the pylorus is on the right side, 3 or 4 mm. caudad to
the oesophageal opening. The wall of the stomach is comparatively thin
except in the region of the oesophageal and pyloric apertures, and at a
point, opposite these apertures, on the left side. At the latter point
is an oval or disc-shaped area that is several times as thick as the
surrounding wall; it probably represents the gizzard structure of the
adult. The thickening mentioned in the region of the two apertures seems
to be mainly due to a wrinkling of the mucosa which, in other parts of
the stomach, is nearly smooth, so far as can be seen with the naked eye.
A sphincter thickening around the oesophageal and, to some extent,
around the pyloric aperture, causes each of these structures to project
into the stomach like an ileo-caecal valve.

The pylorus, _py_, opens into a small, pointed, thin-walled
diverticulum, _di_, and, at the same time, into the duodenum, _d_. The
diverticulum noted, also, in connection with figure 7, has relatively
thick, wrinkled walls; its significance is not known to the writer. From
this diverticulum the duodenum, _d_, leads caudad and laterad for a
short distance as a narrow tube, then suddenly expands into the widest
part of the entire intestine. Into this wide part of the duodenum, 3 or
4 mm. from the pylorus, opens the bile duct, _bd_. The bile sac, _bs_,
is an elongated oval body with thin walls, lying to the right of the
pylorus, its connection with the liver w