KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:0 5. 



113 



Greatest length of skull . . . _ 



Condylobasal length of skull . 



Basicranial length 



Zygomatic breadth 



Length of nasals mesially 



Combined breadth of both nasals posteriorly 

 » » » » » anteriorly 



Length of diastema " 



» » upper molar aeries 



Breadth of m' 



Length of m' 



Breadth across postorbital processes .... 

 Distance from orbit to tip or premaxillary 



These measurements agree aproximately with those of P. brucei somalica but 

 are much smaller than those of P. brucei hindei WEOUGHTOiii * described from the 

 Kikuyu country. The present specimen is, however, probably related to the latter 

 race because it shows exactly the same structure of the hind margin of the palate 

 with »a pair of protuberances* just as described by Wroughton (1. c. p. 108). As 

 the type of P. brucei hindei also was an old female in stage VIII the measurements 

 recorded in Wroughton's diagnose are directly comparable with those above. If 

 such a comparison is made it will be found that the skull of my type specimen is 

 9 mm. (more than 10 "/o!) shorter and 8 mm. narrower than the corresponding mea- 

 surements of P. b. hindei, which discrepancy appears to be too great for allowing 

 identification. The smaller size of the skull, of the present race makes itself known 

 in all other dimensions as well, but the narrowness of the nasals anteriorly (6 mm. 

 against 8 in P. b. hindei) is especially striking as it amounts to one fourth of the 

 measurement of the larger race. 



With regard to the colour this P. b. borana also differs in several respects from 

 P. b. hindei. The dorsal spot of the latter is for instance »cream-buff». 



The Hyrax described above appears to be smaller than other geographic races 

 of Procavia brucei except somalica which, however, is geographically separated from 

 this one by P. pumila and its subspecies P, 6. rudolfi. The shortness of the descrip- 

 tion of P. b. somalica prevents me from pointing out other differences, but as 

 Wroughton undoubtedly had access to skulls of P. b. somalica as well, when he 

 described P. b. hindei, and then pointed out the » curious palatal character* (as 

 described above) of this latter animal this character probably represents one of the 

 differences. 



In the year 1901 Neumann described a Hyrax of the Heterohyrax-grom^ from 

 »Kaffa, Gimirra and Bimeschc* under the nsune Procavia thomasi.^ As his description 



1 Ann. & Mag. Nat. Hist., Ser. 8, Vol. V, p. 107, 1910. 

 ^ Sitzber. Naturf. Freunde, Berlin 1901, p. 240. 



K. Sv. Vet. Akad. Handl. Band 48. N:o 5. 



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