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XXIV. A further Description of the Anatomy of the Mammary 
Organs of the Kangaroo. By John Morgan, Esq., F.L.S. 
Read April 6, 1830. 
Havine upon a former occasion presented the Society with a 
description of certain changes which take place in the struc- 
ture and functions of the mammary organs of the Kangaroo, 
during the period of approaching puberty, as well as during 
several different periods of gestation ; I now beg leave to offer 
a few additional facts relative to the anatomy of these parts, 
which I have recently been made acquainted with, by a dis- 
section of a much younger animal than any that I had previously 
examined. x | | 
It will be recollected, that in my former communication I 
described the anatomical peculiarities which I had met with in 
the mamme of the adult, and in those of the half-grown animal. 
I then stated that in the pouch of the adult and impregnated 
kangaroo, we always find four distinct and perfectly formed 
teats, two being placed on either side, one above the other ; and 
that each of the four teats is attached to its respective mam- 
mary gland: whilst in the younger and unimpregnated animal 
(when nearly approaching the age of puberty) only two of the 
four adult teats can be discovered ; these being the upper on 
each side. I pointed out the mode in which the two lower ones 
became developed : viz. by the protrusion and eversion of mem- 
branous cylindrical canals imbedded in the interior of the 
VOL. XVI. 3N lower 
