THE GLANDS. 263 
a means of dividing the genus, that domestication or confine- 
ment tends to diminish the size of these tufts. From this sug- 
gestion I have been led to carefully look for such effect under 
the conditions suggested, but I have been unable to detect any 
difference in the size of these tufts, on the wild animals and 
those reared in parks or kept in close confinement. 
While on each of the separate species the tarsal gland and the 
tuft of hairs covering it, is not so marked in its distinctive char- 
acteristics, except indeed upon the moose, yet there is quite 
a plain difference between those found on any one species and 
those on either of the others. The fact that they are just alike 
on each individual of either species, renders these marks of great 
value, and justifies a careful study of each so as to clearly appre- 
ciate differences between those found on the different species. 
There is another set of glands, which, though not found on all 
of the species, are constant on some, and would seem to be usual, 
to say the least, on others. These are interdigital glands, and 
like the others of which I have treated, are conglomerate and 
dermal. They are situated between the upper phalangeal bones. 
They are in the form of small sacks opening anteriorly. On 
some species they are larger in diameter and in depth, propor- 
tionally, than on others, and in a given species they vary accord- 
ing to the size of the animal, as do the other glands treated of. 
All have more or less hairs growing within the sack, and they 
vary considerably in their activity. On the more active ones, at 
least, when dissected out from the recently killed animal and ex- 
amined on the flesh side, they seem to be literally covered with 
ducts or divided into lobules readily distinguished by the naked 
eye. 
So far as I have been able to make a personal examination I 
have found them the most extensive in the smallest species, the 
little Acapulco Deer. On a fully adult doe I find the sack to 
be about one inch in depth and five lines in diameter. The sack 
contains a limited amount of hairs and a considerable amount of 
secreted matter which has a pungent, disagreeable, musky odor. 
I find it on all the feet in all the specimens I have had an oppor- 
tunity to examine, and all substantially corresponding to the 
above description, only on smaller specimens it is proportionally 
less. About the same may be stated of the Ceylon Deer. 
Of the Virginia Deer I have examined great numbers for this 
gland. It is always present in all the feet. It is about the 
same size in both sexes. Ona medium sized animal it is fully 
