70 MR. O. THOMAS ON THE [Jan. 5, 



grizzled grey, very much as in P. brucei. Posterior back not tinged 

 with rufous. Belly white or yellowish. 



Dorsal spot inconspicuous, nearly hidden by the surrounding hairs, 

 but on separating these it is seen to be well-developed, elongate, its 

 hairs white or pale yellow to their bases. 



Skull ' light and slender, with a narrow elongated muzzle and 

 flattened frontal region. Parietal, interparietal, and coronal sutures 

 closing at about stage V., always closed in adult animals. Diastema 

 long, about 13 mm. in adults. 



Teeth small and delicate, markedly brachyodont ; breadth of i^' 

 .5'6 to 6*4 ; height of crown of ni^ about 4"5. pi elongate, two- 

 rooted, long, persistent, its crown about 3"7 or 3"9 mm. long. 



Type in British Museum (68. 12. 19. 3). 



Hab. Angola ("region moyenne, et les hauts plateaux," Bocage). 



The retention of this species as distinct from P. brucei rests on 

 very much the same, rather slender, foundation that the separation 

 from it of P. latastei does, namely the age at which the interparietal 

 sutures ordinarily close. This seems to take place in P. brucei at 

 about stage II., in P. bocaijei at stage V., and in P. latastei never, or 

 at least not until fully adult life is reached. The longer and slen- 

 derer muzzle of P. bocagei and its more developed ^ may also serve 

 to distinguish it from both, which then, the intermediate link being 

 gone, seem more than ever distinct l)y their interparietal characters. 



10. Procavia brucei. 



Hyrax brvcei. Gray, Ann. Mag. N. H. (4) i. p. 44 (1368) ; Cat. 

 p. 287 (1869) (excl. syn. — not of later authors^). 



Dcndrohijrax blainviUei, Gray, Ann. jNIag. N. H. (4) i. p. 50 

 (1868); Cat. p. 293 (1869). 



Hyra.v irroratus. Gray, Ann. Mag. N. H. (4) iii. p. 242 (1869) 

 (excl. description of dorsal spot') ; Cat. p. 28S (1869). 



IJi/raA- mossambicns, Peters, SB. uat. Fr., 1869, p. 25. 



Deiidroliyrax bakeri, Grav, Ann. Mag. N. H. (4) xiv. p. 132 

 (1874). 



Size small; forms lender. ^Mammae 1 — 2 = 6. Fur short and 

 close, but fine and generally soft. Colour clear grev, finely grizzled 

 with white ; underfur pale silvery fawn, rather darker basally. 

 Posterior back generally quite similar to the rest, very rarely more 

 rufous, and then only just above the anal region. 



Dorsal spot narrow, elongated, white or yellow, the hairs often 

 white at base and becoming more fulvous terminally, but never with 

 any admixture of brown. 



' Good figures : Grav, Hand-1. Edent. &c. pi. xi. fig. 2 (1873) ; Bocage, f. c. 

 pi. i. 



^ Nor of tlie same author's Hand-l. Edent. &c. p. 40 (1873), where the great 

 majority of the specimens mentioned, and the figured skull, belong to P. abvssi- 

 nica. 



' By some curious error the descriptions of the dorsal spots of " H. irrorafiis " 

 and " H. ferrnginms" were interchanged in Grav's original paper, but the 

 error was corrected iu the " Catalogue " published shortly afterwards. 



