of the Mammary Organs of the Kangaroo. 63 
surface, and closely confined by cellular connections to the skin 
of the pouch (tab. 2. f. 2. a.). To the upper and outward part of 
this structure a second glandular substance of smaller size was 
firmly attached by dense cellular membrane, appearing of a more 
loose and delicate texture, and possessing less vascularity than 
the former; of a yellowish-brown colour, and of an oblong and 
compressed shape (tab. 2. f. 2. b.). From the interior of this 
second gland a number of white membranous bands resembling 
ducts passed to the extremity of the teat; and J could discover 
no further connection, than that afforded by cellular membrane, 
between the larger glandular substance and the smaller; the 
teat and the lesser gland, which I have just mentioned, appear- 
ing to form a distinct and separate mammary organ. As far, — 
therefore, as my dissections had yet gone, the larger gland 
appeared altogether unconnected with any structure by which 
its secretions might be rendered subservient to the purposes of 
furnishing nutrition to the young. Believing, however, that this 
structure must be in some way or other connected with the for- 
mation or functions of those teats which had not yet been de- 
veloped, I proceeded to examine whether any and what con- 
nection might exist between these large and. ly 
glands, and the follicular open ings’ I have already described as 
occupying the situation of the future teats. : 
On passing a small probe through one of these openings, I 
found that the instrument entered a cavity about three-fourths 
of an inch in length; and on carefully dissecting away the 
surrounding portions of the gland, it appeared that this cavity 
was formed by a narrow, membranous, cylindrical canal, which 
was imbedded in the gland, and extended nearly throughout 
its whole diameter (tab. 2. f. 2. c.). The connections between 
this membranous tube and the gland were loose and easily 
broken down, except at the furthest extremity from the aper- 
ture, 
