Both sexes are devoid of antler appendage; but in this the musk-deer agrees with one genus of true deer (Hydrelaphus), and as in the latter, the upper canine teeth of the males are long and sabre-like, projecting below the chin, with the ends turned somewhat backwards.
This deposition of bony matter progresses very rapidly, and although in young deer and the adults of some species the resulting antler merely forms a simple spike, or a single fork, in full-grown individuals of the majority it assumes a more or less complexly branched structure.
When the first or a new antler is about to be formed, the summits of these pedicles become tender, and bear small velvet-like knobs, which have a high temperature, and are supplied by an extra quantity of blood, which commences to deposit bony matter.
The one complete antler has a well-marked burr and a long undivided beam, which eventually forks.
All this time the growing antler is invested with a skin clothed with exceedingly fine short hairs, and is most liberally supplied with blood-vessels; this sensitive skin being called the velvet.
With the exception that the right antler is malformed and partially aborted, and that the bones of the lateral toes have been lost, the skeleton is practically complete.