of graminivorous and carnivorous Animals. 
small openings ; these again lead to several processes, as has 
been described and delineated in the glandular structure of the 
beaver. 
The first portion of the stomach forms about ~ of the whole, 
while the second is only the remaining third ; internally the 
membrane has no peculiar appearance, and is uniformly the 
same in both portions. The cuticular lining of the oesophagus 
terminates immediately above the glandular structure, which 
has just been described ; so that the stomach of the dormouse 
is in all respects very similar to that of the beaver. Vide Plate 
VI. fig. 4 and 5. 
No. VI. The Water Rat. 
The stomach of the water rat is made up of two cavities 
with a narrow communication between them. The cavity into 
which the oesophagus opens is nearly two-thirds, and the other 
rather more then one-third of the whole. The stomach termi- 
nates at the pylorus by a very contracted orifice. 
The first cavity has a cuticular lining continued, from the 
oesophagus over the whole of its internal surface, terminating 
in a prominent serrated edge at the contracted part, except that 
on each side an oval portion of cuticle extends into the second 
cavity ; this is seen through the other coats of the stdmach. 
There are no apparent orifices in this cuticular lining leading 
to glands. The oesophagus opens into it obliquely, so that 
regurgitation can hardly take place. 
The second cavity is lined with a membrane, which, at the 
lower part or greater curvature, is thicker than at any other ; 
the surface is convoluted, and appears to secrete a thick viscid 
mucus ; beyond this there is an irregular zone of orifices, 
which I consider to be the ducts of the solvent glands. From 
mdcccvil X 
