62 Mr. Moncae's Description 
induced to present to this Society a short account of an exami- 
nation which I have recently "made of the female Kangaroo, 
both in the virgin and in the impregnated state; with the hope 
that the result of my dissection, which has enabled me to esta- 
blish a few hitherto unknown facts, may tend to throw some 
further light on the physiology of generation in marsupial 
animals. 
In the beginning of October last I received for dissection 
the body of a young female Kangaroo in a virgin state. On 
opening the pouch of this animal, I found the whole of the 
interior lubricated by a secretion of a reddish-brown colour, 
somewhat viscid in its consistence, and of a faint and peculiar 
odour. This condition of parts I have always observed to exist 
in these animals during the periods at which the pouch remains 
unoccupied by the young ; the secretion being very much dimi- 
nished, or altogether suspended, at the time the young animal is 
lodged within the part. 
On slitting open the fore-part of the pouch eub exposing its 
interior, I was surprised to find that two nipples only were 
developed, one on each side (tab. 2. f. 1. a.), and that imme- 
diately beneath each of these a minute circular aperture, resem- 
bling i in appearance the mouth of a follicle, marked the situa- 
tion in which we usually find the two additional teats in the 
impregnated and adult animal (tab. 2. f. 1. b.). This circum- 
stance led me to examine more particularly the structure of the 
mammary glands and parts immediately connected with them, 
which, having been carefully removed from the body, presented 
upon dissection the following appearances. 
The substance which appeared to form the mammary Baiti: 
was of a circular form, somewhat flattened, possessed of a con- - 
siderable degree of vascularity, and lobulated upon its external 
surface, 
