IV. A Description of the. Mammary Organs of the Kangaroo. 
By John Morgan, Esq., F.L.S. 
Read April 15, and May 6, 1828. 
Tue development and growth of the foetus in marsupial ani- 
mals has long afforded an interesting subject of inquiry for the 
researches of the physiologist; yet, notwithstanding the nume- 
rous opportunities for observation supplied by the domestication 
of the most interesting of these animals, namely, the Kangaroo, 
it is to be regretted that hardly any information has of late years 
been obtained upon this important branch of natural science ; 
for although we are acquainted with a few insulated facts rela- 
tive to this subject, yet we are at present left in total ignorance 
respecting the principal object of our researches. We know 
little or nothing of the nature of those changes which must 
necessarily take place in the young while remaining in the 
uterus, or of the mode by which it is conveyed from that part 
= to the teat: and dissection has hitherto afforded us no satisfac- 
tory information relative to the peculiarity of structure, which 
we may reasonably expect to find in those organs, by which 
the mother is enabled to impart nourishment to the foetus, either - 
while remaining in the womb, or afterwards, when attached to 
the nipple within the pouch. With the view, therefore, of 
affording assistance to those future inquirers, whose time may 
be devoted to the study of this particular subject, and whose 
opportunity for observation may be greater than my own, I am 
induced 
