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 Marscuie 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 Marscuin 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 
plétzlich verschmiilert, aber bei dem ¢ in der Mitte stark eingezogen. Am hinteren 
Gaumenrand sehe ich keine Hicker 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 18,1 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 10,2 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 '*/2 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 Tuomas. 
Tuomas: Ann. & 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 the 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 Jying 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. CUNNINGHAME 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. ¢.) but some of my 
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. 
