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Show 1904.] MAMMALS OF THE UGANDA BOUNDARY COMMISSION. 463 group besides those already recorded. The typical Procavia? of the hypsodont section have 1-2 = 6 mamma?, while the Dendro-hyrax section were supposed to have in all cases only 0-1 = 2 mamma?. Now, however, we find that the two adult females of the present series (one of them in spirit) have a pectoral pair of mamma? combined with a single inguinal pair, the formula being therefore 1-1 = 4. On communicating with Dr. Matschie, the describer of P. stuhlmanni, he informs us not only that a fresh examination of the typical series confirms our numeration of the mamma?, but also that the same formula obtains in P. arborea and P. scheelei, while his P. neumanni has the more usual 0-1 = 2. Of other species recently described, P. crawshayi Thos. has 0-1 = 2 mamma?, while the large woolly-haired P. rnwenzorii Neumann* has again 1-1=4. Now that representative specimens of P. stuhlmanni are available for comparison, we are enabled to describe as new the following Dassie, which had hitherto been provisionally assigned to Dr. Matschie's species :- PROCAVIA BETTONI. Procavia bettoni Thos. & Schw., Abstr. P. Z. S. 1904, No. 6, p. 23, April 26. Most closely allied to P. stuhlmanni, but darker coloured and smaller. Fur long, soft and fine, not woolly; hairs of back about 33 mm. in length, intermixed with longer bristles. General colour above pale drab-brown, washed with a warmer tone along the dorsal area. Individual hairs dark chocolate-brown, darkening to black for their basal seven-eighths, ringed with pale drab sub-terminally and tipped with black. Face brown, a spot on each eye whitish. Ears thickly haired, brown outside, white internally. Lips white. Chin brown, throat drabby white ; rest of under surface and inner side of limbs creamy white, the hairs white to their bases. Outer side of limbs like body ; hands and feet pale buffy. Dorsal spot small, oval, its hairs wholly pale yellowish white. Skull, as compared with that of P. stuhlmanni, markedly smaller, the type, in stage V, smaller than that of a P. stuhlmanni in stage IY. Nasals small, with less projection over the nasal opening. Orbits not closed in behind, though the processes approach each other closely. Interparietal sutures, in stage V, closed behind but open in front, as is also the case in P. stuhlmanni, but the breadth of the interparietal appears to be greater in the new form, and its anterior edge, instead of being strongly arched forward, is nearly directly transverse. Posterior nares very narrow. Molars conspicuously smaller in all dimensions than in P. stuhlmanni. * P. Z. S. 1902, ii. p. 143. |