612 ox TUE UROGEXITAL ORGANS OF THE KAXGAEOO, 



is given and it is possible that the specimen in question \\-as JI. 

 Bennettii, but tliat Pagensteclier used the term II. ruftcoUls 

 merely as a synonym. 



Of ni}' four specimens two v/ere from animals measuring 25-^- 

 and 29 in. respectively, this measurement, here as throughout 

 this paper, being from the tip of the nose to the root of the tail. 

 Each of them had a mammary foetus in the pouch, the young 

 ones measuring 7^ in., 13 in., 10 in., and 7 in. respectively. All 

 the specimens shew a direct communication, as in previously 

 described examples. The ridges in the urogenital canal are as 

 •well marked as before, but as in other species, when any number 

 of specimens is examined, many differences in detail are met with, 

 both here and in the median vagina. For instance the median 

 ridge may measure as much as f in. in length, or it may become 

 imperceptible at t} in. from its anterior extremity. In one case 

 from the posterior extremity of it a secondary ridge curves out- 

 wards and forwards to the longitudinal ridge on one side of it. 

 There are also some secondary longitudinal ridges without any 

 definite arrangement, and even relatively less conspicuous than 

 is the case in the two species next to be considered. 



In the median vagina no well-marked longitudinal septum was 

 met with, but this may have been due to the v/ay in which the 

 chamber was cut open as is explained later on'. On laying aside 

 the cut edges of the dorsal wall, the ventral surface is slightly 

 convex from side to side, and has a dcnrcssion running;- alonj2r 

 each margin. It presents slight longitudinal furrows and ridges 

 usually more numerous anteriorly. Sometimes hovrever there 

 are transverse puckerings, especially in the anterior portion. 

 Erom the margins slight imperfect septa or trabecuhe sometimes 

 reticulating, radiate obliquely to the side walls. In one specimen 

 the dorsal wall was very thin, while in another it was more than 

 double the thickness. Once a well-marked projection intervening 

 between the tw^o papillje carrying the ostia uterorum was noticed. 

 This perhaps was the remnant of a longitudinal septum. 



