1881.] 



ANATOMY OF THE ERINACEID^. 



401 



over tlie os uteri, the lateral opening of wliich at first appeared to 

 be the os (see fig. 8) ; on dividing this the true os was found to 

 have been concealed in its deep recess. The ovaries are botryoidal, 

 and enclosed in peritoneal sacs. 



-'ig. 8. 



O.ll. 



Uterus ami vnginn of Gymnura raffcsii (liorizontnl see(ioii). 



Fig. 9. 



Uterus and vagina of Erinacetis eiiropcBUs (hoi'izontal section). 



On either side of the rectum a large preanal glar.d, about the size 

 of half a walnut, is found, invested externally with circularly dis- 

 posed muscular fibres, and its cavity lined internally with a glan- 

 dular memhrane having several deep lacunre, and filled with a large 

 quantitv of a friable brown substance. The openings of these glands 

 are small and circular, placed immediately in front of the anterior 

 margin of the anus. 



