216 



ANniAL CASTRATION 



li.. 



Fig. 214 — Showing incisions over site of anal glands. F, Anus; E-E, incisions. 



two thin layers of muscular fiber, viz. : ischio-cavernosus and bulbo-eaver- 

 nosus muscles. The glandular organ is surrounded by a well defined 

 envelope. Each gland is supplied with an excretory duct. These ducts pro- 

 ject through the lateral walls of the rectum immediately anterior to the 

 anus. Their openings are nipple or jet-like for governing the direction of 

 the stream. AVhen the skunk considers itself in danger its behavior is as 

 follows : 1. It turns its posterior parts toward the object of attack. 2. Ele- 

 vates its tail. 3. Inverts the anus exposing the nipple-like openings of the 

 ducts. 4. By voluntary muscular contraction the sac or scent reservoir is 

 compressed and the scent fluid expelled. This fluid may be thrown for a 

 distance of twelve to fifteen feet, the direction of the stream being under 



