Description of The Scent Glands of The Skunk.
The annal glands which are possessed also by other members of the weasel family are developed in the skunk to such a wonderful degree as to constitute an effective means of defense. They are not related in any way to the genito-urinary system either in location or function. They are the same in both sexes.
Laymon and Assistant Removing the Scent Sac.
The scent fluid which is the special secretion of these glands is contained in two sacs located beneath the skin, one on each side of the vent. Each sac is embedded in a powerful, gizzard-like, muscular envelope the contraction of which discharges the scent fluid. Fig. 1 and Fig. 2 show general location and form.
Within the rectum just beyond the sphincter muscle which ordinarily keeps the vent closed are two papillae from which the scent is discharged. Each papilla is connected with one of the scent sacs by a discharge duct.
Ordinarily the discharge papillae are not visible but when the skunk discharges the scent fluid the tail is raised and doubled close along the back, the vent is relaxed and turned outward to such an extent that the pappillae becomes external and from them the scent is discharged and directed with remarkable accuracy.
The skunk takes great care not to get any of the scent on its tail or fur and the slightly skunky odor which fur garments sometimes have is usually the result of carelessness in killing or skinning the animal. To kill without scent the backbone should be broken by a quick blow or the skunk should be drowned.
When held by the tail with head hanging down and with tail and backbone in a straight line the skunk cannot control the muscles which evolve the rectum and discharge the scent. Care must be taken that the skunk does not twist or climb upward. It should be held low to keep its interest centered on the ground which it will strive to reach.