1904.] MAMMALS OF THE UGANDA BOUXDARY COMMISSION. 463 



group besides those already recorded. The typical Procavia? of 

 the hypsodont section have 1 — 2 = 6 mammae, while the Dendi'O- 

 hyrax section were supposed to have in all cases only — 1 = 2 

 mammfe. Now, however, we find that the two adult females of 

 the present series (one of them in spirit) have a pectoral pair of 

 mammfe combined with a single inguinal pair, the formula being 

 therefore 1 — 1 = 4. 



On communicating with Dr. Matschie, the describer of P. 

 stuhhnanni, he informs us not only that a fresh examination of 

 the tj^pical series confirms our numeration of the mammae, but 

 also that the same formula obtains in P. arhorea and P. scheelei, 

 while his P. neumaniii has the more usual — 1 =2. 



Of other species recently described, P. craivshayi Thos. has 

 — 1 = 2 mammae, while the large woolly-haired P. ruivenzorii 

 Neumann* has again 1 — 1 = 4. 



Now that representative specimens of P. stuhhnanni 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 heitoni Thos. & Schw., Abstr. P. Z. S. 1904, No. 6, 

 p. 23, April 26. 



Most closely allied to P. stuhlmianni, 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 jDale 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. sUMmanni, markedl}^ 

 smaller, the type, in stage Y, smaller than that of a P. stiM- 

 manni in stage IV. 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. sUthl- 

 manni, 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. 



