64 Mr. MoncGaAN's Description 
ture, at which part the two structures were inseparably united. 
On making a section of the tube, I found that its cavity was 
nearly half filled with a secretion precisely resembling that 
already described as lubricating the interior of the pouch, and 
that its internal surface was formed by a reflection of cuticle 
continued from the surface of the pouch through the aperture 
by which it opened into that part. 
At the furthest extremity of the canal, and at the part already 
described as connected firmly with the gland itself, its termina- 
tion was formed by a rounded papilla, which projected into its 
interior, resembling in miniature the extremity of the future 
teat in the adult. On making a section of the papilla, this 
resemblance was still further increased by the exposure of nu- 
merous minute vessels, which presented very much the appear- 
ance of lactiferous tubes, and which passed directly from the 
expanded base of the papillary projection to its extremity (tab. 2. 
f.2.d.). By an examination of the extremity of the papilla 
through a lens, the similarity between that part and the teat of 
the adult was strikingly shown. From these circumstances, I 
considered that the identity of this structure with the future 
teat was rendered more than probable; and it occurred to me, 
that the only mode by which a development of the organ could 
take place, must consist. in the complete eversion of the canal, 
and the consequent protrusion of its puetsny imbedded and 
papillary extremity. : 
The canal on the opposite side had not yet been opened: 
with a view, therefore, of producing an artificial eversion by - 
mechanical means, I made pressure upon that point of the 
gland, which I knew from previous dissection to be closely 
connected with the papillary extremity of the tube, and suc- 
ceeded at length in completely everting (through the opening 
already mentioned) the whole of the canal, from one extremity 
to 
