EXTERXAL CHARACTERS OF MONGOOSES. 



369 



Text-figure 10. 



vulva. 



A. C]osei nual ssic oi Helogale nndulata, ^ 



B. Aual sac of the same, partially distended. 



C. Anal sac of Selogale undulata, (J, on a larger scale, full^- distended, and 



showing glandular pouches or depressions, a., anus; o., orifice of anal 

 gland; sc, scrotum. 



D. The same of Ariela fasclata, ? . Lettering as in preceding figures. 



E. The same, dissected and seen fi'om within, showing the single pair of normal 



aual glands {a.g.), that of the left side opened to show orifice (o.) into sac; 

 r., rectum turned aside. 



F. Anal sac of Crossarclius ohscurus, ?, cut from below and spread open. 



r., rectum, cut opeu ; .v., fine cutaneous ridges extending' from upper margin 

 of sac to anus ; other lettering as above. 



G. The same anal sac shown partially distended when the tail is raised. 



H. Anal sac of Suricata siiricatta, 2 , distended to show the glandular depressions, 

 with the scrotum-like swelling between the vulva and the lower rim of the 

 sac. 



