114 EINAR LONNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 



chiefly consists of a comparison of the then new form, and P. valida{\) it gives 

 comparatively little information about Procavia thomasi, and there are no skull mea- 

 surements. I have therefore written to Professor Matsohie and asked him to kindly 

 provide me with some skull measurements and some notes about the shape of the 

 nasals and the condition of the posterior palate. Professor Matsohie kindly replied 

 and gave the following information which proves that Procavia thomasi is quite 

 distinct from P. brucei borana. As his notes may be of use for other authors I take 

 the pleasure of pulishing them here. »Die Nasalen [of Procavia thomasi] sind nicht 

 plotzlich verschmalert, aber bei dem J" in der Mitte stark eingezogen. Am hinteren 

 Gaumenrand sehe ich keine Hocker neben dem medianen Processus.* 



The greatest length of the skull of a female in stage VIII from Gimirro is 82,4 

 mm., in a male and two females stage VII it varies from 86 to 89 mm. The basal 

 length in the three latter is from 71 to 76,4 mm. The length of the nasals mesially 

 is 17,7 in the oldest female, in the others 18,i to 19,4 mm. The breadth of the nasals 

 posteriorly is from 16 to 17,6, and in front 7,5 to 7,8 mm. The length of the molar 

 series is 30,4 to 31,5 mm., of the diastema 10,3 to 11,7 mm. 



These measurements indicate that P. thomasi is larger than P. b. borana. 



The type specimen of the latter was shot in the afternoon '7^ 1911 when run- 

 ning along a rocky ledge in a small ravine just north of Guaso Nyiri about one days 

 march to the east from the Marsabit road. Its distribution extends probably chiefly 

 westwards from the locality mentioned because further east (below Chanler Falls and 

 at Njoro) its place is occupied by a still smaller Hyrax. 



Procavia pumila rudolfi Thomas. 



Thomas: Aiin. & Mag. Nat. Hist., Ser. 8, Vol. V, 1910, p. 202. 



In the thornbush country north of Guaso Nyiri rocks of varying sizes from a 

 small mountain to a rocklet are numerous, and as they are always very much weather- 

 worn and full of cracks and crevices they offer very good dwellings for Hyraxes. 

 They are also very often inhabited by such. At Njoro and in tlie thornbush country 

 below Chanler Falls this small race is very common. 



It is to great extent diurnal in its habits. If one carefully approaches some 

 rocks inhabited by this species one may be sure of seeing several Hyraxes running 

 about, or lying basking on the ledges. Others may be seen running back to shelter 

 from the thornbush. When frightened they disappear, of course, at once, and even 

 wounded specimens are lost if they are not killed on the spot. Only once I saw 

 some of these animals run down from an acacia growing near their rocky refuge, and 

 Mr. R. J. CuNNiNGHAMB told me that he one day had seen a Hyrax of this small 

 kind with great dexterity move about in a frightfully spiny bush. 



The colour of the fur agrees with Thomas' description (1. c.) but some of ray 

 six specimens are darker and the dorsal spot varies from buff to rufous. 



As Thomas only has had an immature male at his disposal it appears of interest 

 to communicate some cranial measurements. 



