BY J. J. FLETCHER, M.A., B.SC. t) 



have met, and the direct comniimication would have been formed. 

 These two specimens would seem to show that the direct commu- 

 nication is completed independently of the median vaginal canal, 

 and by the extension backwards of what has the appearance of 

 being an involution of the urogenital canal. As this condition has 

 been met with in two only out of fifteen specimens (excluding M r , 

 major,) of which sections have been cut, though some of the 

 animals from which they come were nearly adult, it would seem to 

 be brought about, as a rule, probably during pregnancy and only 

 exceptionally earlier as in the two cases in question. All my 

 pregnant specimens so far have been from animals which had 

 previously borne young and so throw no light on this point. The 

 direct communication in virgin animals has been met with 

 previously in two cases, namely by Lister in H. ualabatus and 

 Brass in H. beunettii. 



Macropus Major. — Four specimens from animals of which I am 

 unable to give the measurements. From three specimens sections 

 which were cut differ from those considered above, chiefly in the 

 fact that the cul-de-sac came to an end sooner, and always before 

 the urogenital canal appeared in section, in one case this 

 happened thirty-eight sections before the urogenital canal appeared 

 in section, and seventy sections before the meatus urinarius was 

 reached. I am unable to give the number of sections in the other 

 two cases. 



Summary and Conclusion. — The eighty specimens treated of in 

 this and in my first paper are here considered together. 



1 . The post partum existence of a direct communication between 

 the median portion of the vagina and the urogenital canal has been 

 verified in the case of three species— -Petrogale penicillata, 

 Halmaturus ruficollis, and Osphranter ruf us. 



2. Three species — H. dorsalis, Osphranter robustus and Ony- 

 chogalea frsenata have been added to the list of nine in which such 

 a direct communication is known to obtain. The twelve species 

 then are — Halmaturus benettii, H. ruficollis, H. billiardieri, H. 



