South of Kilimanjaro this Dik-dik has been obtained by Herr Neumann at several localities in the interior of German East Africa, in Irangi and Northern Ugogo, and on Mount Gurui, and by Böhmer near Mpapwa. But Sir John Kirk assures us that in his extensive experience he has never met with it on the coast south of the Sabaki River. The variations in colour of this species have caused us some difficulty, as while some specimens are strongly black-lined, without any, or with little, rufous on the sides, neck, and throat, others are clear rufous, almost without lining, on these parts. The strongest-lined specimen we have seen comes from Kilimanjaro[4], while the most rufous is from Lamu. Curiously enough, however, the types, from Brava, South Somaliland, are fairly intermediate in their colour between the two, although, if anything, rather more like the one geographically most distant, that from Kilimanjaro. In the skulls again, while, as is usual in these Antelopes, considerable differences are to be observed between any two skulls compared together, these differences do not appear to be correlated either with locality or colour-characters. In fact, with regard to the extension backwards of the premaxillæ towards the nasals, one specimen in the British Museum Collection has the two extremes on the two sides of its skull, showing conclusively that this character cannot be relied upon. We have therefore come to the conclusion that, so far as the colour and skull-characters here mentioned are concerned, the Kilimanjaro, Lamu, and Brava Dik-diks cannot be separated from one another, even as subspecies or local races. _December, 1895._ 57. GÜNTHER’S DIK-DIK. MADOQUA GUENTHERI, THOS. [PLATE XXXI. FIG. 1.] _Neotragus_, sp., =Lort Phillips=, P. Z. S. 1885, p. 932 (Somali plateau). _Neotragus kirkii_, =Scl.= P. Z. S. 1886, p. 504; id. in James, Unknown Horn of Africa, p. 269 (1888). _Madoqua guentheri_, =Thos.= P. Z. S. 1894, p. 324 (figs. of skull) (Ogaden); =Hoyos=, Zu den Aulihan, p. 185 (1895); =Swayne=, Somaliland, p. 318 (1895). VERNACULAR NAME:--_Gussuli_ of Somalis (_Swayne_). Size of _M. kirki_. Proboscis much more elongated. General colour coarsely grizzled greyish fawn, very much as in Kilimanjaro examples of _M. kirki_. No rufous on the sides, and that on the limbs very dull. Crest much mixed with black. Backs of ears greyish fawn. Skull with the nasals even more shortened than in _M. kirki_, and the muzzle even longer and slenderer. In fact the whole appearance of the skull shows that the proboscis is much more developed than in any other member of the group. Front of the nasals only about level with the back of the middle premolar. Premaxillæ short, not nearly reaching the nasals. Basal length (male) 3·6 inches, greatest breadth 2·08, muzzle to orbit 2·04, tip of nasals to tip of premaxillae 1·56.