BY J. J. FLETCHER, MA., B.SC. 7 



Excluding the specimens of M. major, it may be stated generally of 

 the others, that the median vagina came to an end sometimes rather 

 abruptly, but usually in a more gradual manner, and that this 

 never took place un.il sections showing the uro-genital canal were 

 met with. The sections after the disappearance of the median 

 vagina were carefully counted until the meatus urinarius was met 

 with, and from a comparison of the numbers, it would appear as a 

 rule, that the more nearly full-grown the animal from which the 

 orgaus came, the fewer the intervening sections, that is, the further 

 back the cavity of the median vagina extends. The ridges in the 

 uro-genital canal are as previously described. 



Petrogale penicillata. — One specimen from an animal measuring 

 1 9 inches. It is very similar to the second specimen of the same 

 species described in my first paper, except that fewer sections — 

 twenty-eight as compared with forty- two— intervene between the 

 disappearance of the median vaginal chamber and the first appear- 

 ance of the meatus urinarius. 



Halmaturus rujicollis. — Two specimens from animals, measuring 

 22 in. and 24 in. respectively, as compared with 25^ in. and 29 in. 

 in the case of two females with young in the pouch, shot in the 

 same locality. A complete longitudinal septum is present in both 

 specimens. In one case the septum does not reach to the end of 

 the chamber, whereas in the other, it still appears in sections 

 which show the uro-genital canal. The sections intervening 

 between the ending of the median vaginal chamber and the first 

 appearance of the meatus urinarius were 47 and 54 respectively. 



Osphranter robustus. — Four specimens of which two were from 

 animals measuring 28 in. and 30 in. respectively. I have not the 

 measurements of the other two, but judging from the size of the 

 organs, one of them was slightly and the other considerably larger 

 than the two first mentioned. In addition, I have cut sections of 

 specimen (d) of my first paper. All five, except in the number of 

 sections which intervene between the ending of the median part of 

 the vagina and the first appearance of the meatus urinarius, do not 

 materially differ from specimen fc), described in the same paper. 



