of the Ornithorhynchus Hystrix. 353 
wards, the whole is conveyed into the stomach, and along with 
it a quantity of sand. 
The stomach therefore is sufficiently large to contain the food, 
and the extraneous matter connected with it ; and is defended 
from injury by its cuticular lining. In the paradoxus, the food 
is received into the mouth, is retained in the lateral pouches, 
and is prevented, by the two projecting teeth on the tongue, 
from getting into the stomach, till all the indigestible parts are 
separated ; the nutritious matter alone being allowed to reach 
the stomach, which is of a very small size. 
The course of the intestines, and the form of the c cecum, are 
the same as in the paradoxus ; the caecum is shorter, being only 
half an inch long. 
The small intestines are seven feet, the colon and rectum 
i 
two feet long. 
The rectum is similar in every respect to that of the para- 
doxus. 
The mysentery, its glands, and the lacteals, are also similar 
to those of the paradoxus. 
The internal membrane of the duodenum has a corrugated 
appearance, but no valvulae conniventes. The cavity of the small 
cascum is not Ioculated ; and there are ten or twelve excretory 
ducts of glands on the membrane of the colon, near the open- 
ing of the caecum ; but these are placed irregularly ; and there 
are many similar orifices, in different parts of its course. 
The liver and gall-bladder, with their ducts, and also the 
omentum, are similar to those of the paradoxus. 
The pancreas is not so much separated into detached parts as 
in the paradoxus ; but is less compact than in quadrupeds in 
general. 
