194^ OBSERVATIONS ON THE ANATOMY OF 
rated in the centre. The three largest nipples measured 
3 J lines in length, and 1 Une in breadth at their base. On 
pressing the mammary glands, which are two in number, 
and extend along the back of the two rows of nipples, a 
thin yellowish fluid was seen to issue from six or seven 
small orifices of excretory ducts, opening round the apex 
of each nipple, as in other quadrupeds. These minute ori- 
fices around the extremities of the nipples were very dis- 
tinctly seen with a lens, and in the largest nipples they ap- 
peared open tubes ; but there was no orifice of any kind in 
the smooth centre of the nipple, to indicate any previous 
organic connection with the foetus. 
When 1 received the specimen for examination, there 
was one foetus in a very imperfectly formed state, lying 
loose in the sac. It measured only 11 lines from the mouth 
to the anus ; its surface had a smooth, white colour, and 
had no hairs on any part. The head and chest were the 
parts of the body most developed, as in the foetus of other 
quadrupeds ; the head was more than a third of the size 
of the whole foetus. The eyes were proportionally large ; 
and the eyelids were closed on both eyes. On opening the 
eyelids, a white opaque surface presented itself, through 
which neither pupil nor cornea could be distinguished. 
The ears were distinguishable, though very small and 
membranous. Both jaws were of the same length, and 
very broad and short. The mouth was open, and present- 
ed no appearance of any previous organic connexion witli 
the nipples of the mother. The surface of the belly was 
quite smooth, and slightly carinated in the region of the 
umbilicus, but no trace of umbilical cord, or other means 
of connexion with the parent, could be discovered with the 
assistance of a lens. On the lower part of the abdomen 
there were two distinct lateral folds of the skin, forminfr an 
nnperfect abdominal pouch, opening below like that of the 
