434 Rey. M. J. Berkeley and Mr. Hoffman 
third of that distance and is not so thick. The whole of this and the 
upper half of the second sac is divided into two by a thick crest-like 
fold. On each side of this, at the point where the cesophagus enters, the 
stomach is constricted, and on the exterior side is a valvular projection 
taking a spiral direction inwards. 
In this upper portion of the stomach beyond the valve is a small rib 
running at first parallel with the crest, and when arrived at the apex turning 
round and again running parallel with the crest, thus forming a small loop 
within which are little concentric ridges, like the lines at the tips of the 
fingers; but these gradually become fainter, and the portion of the wall 
within the loop is thickened until it becomes confluent with the valve: 
the valve itself runs parallel with the loop for more than half of its 
length. Between the crest and this the coat is nearly smooth or very 
slightly wrinkled transversely; but on the other side of the loop near the 
constriction are some narrow thick parallel folds at right angles to the 
loop, beyond which again are some narrower more oblique folds. 
The second sac is very small; the coat marked with a continuation of 
the same series of transverse wrinkles. To the portion of the crest in 
this sac is applied lengthwise a thin transparent plate marked with 
transverse lines, and dotted between them, which has a ridge with small 
teeth which project horizontally. We could not detect the mode of 
attachment, but supposed that it was free along the denticulated margin 
and fixed below. We found it however simply applied close to the 
crest, without any attachment. Our attention was drawn to it in conse- 
quence of the little teeth which make this portion of the crest appear as 
though it had adenticulated margin. Beyond the point where the crest 
terminates is a small ccecum, from which there is a communication round 
the crest with the passage down which the food passes in its entrance from 
the cesophagus. Beyond this is a valvular projection as before, but 
thicker than that in the first, the office of which seems to be to cut off at 
pleasure the communication down the channel just mentioned. Possibly 
something analogous to rumination may be carried on. 
The third sac is still smaller; its walls are not marked with any 
remarkable ruge, but internally there is a thick projection which seems a 
