410 



MR. R. I. POCOCK ON THE EXTERNAL 



scrotum, and from it the glandular central area is somewhat 

 sharply marked off. 



Text-figure 1 1. 



A. Anus and scrotum of Nasua nasua. 



B. Anus of Nasua opened to show the glands ; the upper margin of the 



anus below. 



C. One of the anal glands of Nasua in vertical section, showing the 



series of pouches opening upwards and the underlying muscle. 



D. Anus and vulva of Potos. 



The adult female possesses a similar glandular depression round 

 the anus, but the surrounding area of naked skin is not so wide 

 above and laterally, although extending inferiorly to the vulva*. 



In an immature female, six months old, the anus is like that of 

 Procyon, showing no special development of glands. 



The four genera I have examined may be tabulated as follows 

 by their specialized scent-glands : — 



a. Anus opening in the centre of a shallow glandular pouch like 



that of the Mungotidae ; normal anal glands retained Ailurus. 



a. Anus as in ordinary Carnivora f. 



h. Anal glands suppressed; two ventral cutaneous glandular 



areas Potos. 



V . Anal glands retained; no ventral cutaneous glands. 



c. A pair of anal glands of the type normal in the Carnivora.. Procyon and 



Passariscus. 

 c'. Anal glands peculiar, consisting of a series on each side of 



five shallow slit-like pouches Nasua. 



* Adults of both sexes of the Panda have the habit, so well known in the 

 Mongooses, of rubbing the secretion of the anal region on the branches or other 

 parts of their cage. 



f On the assumption that my interpretation of Gervais' description of the anus of 

 Passariscus is correct. 



