BT J. J. FLETCHER, B.A,, B.Sc. 649 



Secondary ridges are also to be met with but tliey are not so 

 conspicuous even relatively as in the lied and the Wallaroo. They 

 may be parallel to the main ridges, or may appear as bifurcations 

 of them and they may or may not extend as far forwards as 

 the distal openings of the lateral canals. In one case the whole 

 interior of the urogenital canal was much more irregularly 

 rugose than usual. 



In regard of the median vagina no two of them are quite alike, 

 either in the arrangement of the folds and puckerings, or in the 

 appearance presented by the ventral wall. The latter in one case 

 appears as a narrow ridge with a slight median groove. In others 

 there is a more or less well-marked ridge, or the ventral surface 

 may be flat. In all cases there are longitudinal folds and obliquely 

 radiating trabeculae and transverse puckerings, but all without 

 definite arrangement. An interesting feature about these 

 specimens is the extent to which the j^apillaB on which the ostia 

 nterorum are situated, project into the cavity of the median 

 vagina which they block to such an extent as to render it diflScult, 

 if not impossible for an embryo to pass into the lateral canal, and 

 correspondingly easy for it to pass into the urogenital passage 

 through the direct communication. The papillie were laterally 

 in more or less close contact, and their tips may be as as much 

 as -iV in. below the lower margin of the entrance to the lateral 

 canals. Externally their large size causes a distention, in some 

 cases as marked as that in the specimen of 0. rufiis, in which it 

 was due to the presence of the waxy looking masses described 

 above. Except in two specimens Onijchogaleafrcsnata I have not 

 noticed this character in such a marked degree in other kangaroos. 



OnycliO(]alea frcdnata. — The organs of four of these pretty little 

 scrub kangaroos have been examined. As in the preceding case 

 I know of no reference whatever to the anatomy of this species. 

 One animal shot by myself had a young one 6 in. long on the teat. 

 Of the other three which were got by my collector, two had young 



