KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:0 5, 157 
The belly and under parts generally are pure white, sometimes with sharp limi- 
tation, sometimes with a narrow pale isabelline band bordering the lower flanks, The 
throat is also white but the lower side of the neck is like its sides grizzled, although 
with still more white. The face and muzzle »buff» (Rép. de Couleurs 309. 3), the 
sides of the head like the neck. A white eyebrow-mark is present. The crest of the 
males is black with broad whitish subterminal rings on the anterior, and rufous buff 
rings on the posterior hairs. In the females the crest is much shorter, and its poste- 
rior portion consists of rufous hairs with Jong black tips. There is thus a considerable 
difference between the sexes with regard to the crest as well. The feet are a little 
paler buff than the face. 
With regard to the pure white of the lower side these specimens agree with 
Rh. quenthert wroughtoni DRAKkt-BrRockMAN but differ from Rh. guentheri in which, 
according to the author quoted’, »the yellow grizzling fades somewhat gradually into 
the pale pinkish buff of the chest and abdomen». It is thus also with regard to 
the colour easy to distinguish these specimens from Rh. guentheri, but it is more 
difficult to express any opinion about their relation to Rh. g. wroughtoni a single 
specimen of which has been shortly described from the »foot hills of Mt. Akul Kas- 
sim, Wabi River Gallaland, Abyssinia within 20 miles west of Sheikh Hussein». To 
make sure about the identity I took the liberty of sending one of my specimens to 
Brit. Museum for comparison with the type of this subspecies, and Mr Guy DoLLMAN 
kindly replied that »the colour is exactly the same, both as regards pattern and 
tint». 
With regard to cranial measurements the type of Rh. g. wroughtoni is similar 
to the present specimens except that it has considerably longer nasals viz 13 mm. 
But DoLLMAN’s comparison settles the question. It is therefore to be assumed that 
the type specimen of Rh. g. wroughtoni had unusually long nasals and that these 
bones vary in length more than hitherto has been known. Drake-BRocKMAN has said 
that the ears of Rh. g. wroughtoni are longer and broader than in other species except 
Rh. cavendishi, but exact measurements are not given for either of these. The length 
of the ear of the specimens from Guaso Nyiri is about 94 mm. and the Jength of 
the opening of the ear-conch is about 73 mm. The latter measurement is about 
similar to that of Rh. nasoguttatus. 
DRAKE-BROCKMAN’s description is rather short, and I have therefore discussed 
these specimens somewhat fully to show the variability of the species and make it 
better known for the future. For the same purpose the accompanying table of mea- 
surements of five skulls has been prepared. The type locality of DRaku-BRrocKMAN’s 
subspecies is situated very far from the one where my specimens have been collected 
and this appeared to begin with to speak against the identity as the Dik-diks often 
have a rather restricted habitat. 
1 Ann. & Mag. Nat. Hist. Ser. 8 Vol. IV, p. 51. 
