ATAVISM. H7E 
had an areola of pigmented skin; when removed, 
and the parts examined microscopically, glandular 
tissue was found beneath it. 
The most frequent situation on the exterior of the 
body in which to find aberrant mamme is the arm-pit ; 
here they appear as glandular masses, communicating 
with the free surface of the skin by means of nipple- 
_ less pores, and in parturient women furnish milk and 
colostrum. Champneys has particularly investigated 
this form of mamma, and finds that they are of frequent 
occurrence. Axillary mammz with nipples have been 
recorded by several reliable observers. 
The tendency of protected cutaneous surfaces to 
become glandular is a matter of great interest, not only 
in connection with aberrant mamme, for it serves to 
explain the abundance of teats lodged within the pouch 
of opossums. 
It is a noteworthy fact that cutaneous and mucous 
recesses are as a rule richly supplied with glands. Take, 
for instance, the large glands besetting the ocular aspect 
of the eyelids, the crowd of glands lodged in the arm- 
pit, in the external ear-passage which secrete ear-wax, 
and in many situations- which readily suggest them- 
selves to anatomists. As far as I have looked into the 
matter, no one has suggested any useful purpose served 
by glands in these situations worthy a moment’s 
reflection. 
The consideration of cutaneous recesses leads us to 
deal with the remarkable pouch of marsupials, which is 
neatly described as the bag of the opossum by Paley in 
his “Natural Theology” :—“A false skin under the 
