48 REPORT ON A BONE BRECCIA DEPOSIT NEAR THE WOMBEYAN CAVES, N.S.W. : WITH DESCRIPTIONS OF SOME NEW SPECIES OF MARSUPIALS. By R. Broom, M.D., B.Sc. (Plates vi.-viii.) About 18 months ago I discovered a small bone breccia deposit in the neighbourhood of the Wombeyan Caves. The deposit is situated in a small depression near the top of the hill above the present caves and no doubt is portion of the floor of an older cave whose walls and roof have long since been weathered away. The deposit consists of a rather hard light brown calcareous matrix containing imbedded in it innumerable small bones. In some parts the bones are almost all small and packed together so closely that there is very little matrix; in others the matrix is comparatively free from bones, only containing a few of the larger forms. As the deposit is unquestionably old and contains some forms new to science — two of which I have already described* — I have thought it well to give a detailed account of the forms found, as it will give a fair idea of the smaller animals living in later Tertiary times. Macropus (Halmaturus) wombeyensis, n.sp. (PI. VI. figs. 1-3). Though the deposit is essentially one of small bones, there are a number of bones of a species of Mdcrojvis. Besides a number of vertebne and long bones, I have succeeded in finding three imperfect fragments showing the upper molars, and four moderately well preserved lower jaws— two of which are pre-sumably from the same individual. In size the form was apparent!}' * Proc. Linn. Soc. N.S.W. (2) Vol. x. (Pt. iv. 1S95).