Horns slender, those of the only adult Somali male we have seen--that presented to the British Museum by Mr. Bonham Christie--longer than usual, just over 3½ inches. _Hab._ Plateau of Central Somaliland. Günther’s Dik-dik, as Thomas has named this species, after the distinguished naturalist who has lately vacated the post of Keeper of Zoology in the British Museum, is the third member of the genus found in Somaliland, but, as a rule, it inhabits a different district from _M. swaynei_ and _M. phillipsi_, though Capt. Swayne thinks that in some cases their ranges may overlap. It belongs to the long-snouted section of the genus, like the two preceding species, but has its nose still more lengthened and proboscis-like. [Illustration: Fig. 30. Skull of _Madoqua guentheri_ (side view, reduced). (P. Z. S. 1894, p. 324.) Fig. 30 _a_. Skull of _Madoqua guentheri_ (from above, reduced). (P. Z. S. 1894, p. 325.)] Mr. Lort Phillips, so far as we know, was the first of the explorers of Somaliland to bring home an example of this Dik-dik. But when that sportsman read his notes on the Somali Antelopes, obtained during his journey of 1884, before the Zoological Society, Sclater did not venture to determine the single immature skull that was obtained, and in his subsequent notes on the same specimen, read in 1885, he referred it with some doubt to _M. kirki_. It was not until 1894 that the additional examples of this Dik-dik received by the British Museum from Capt. Swayne enabled Thomas to vindicate its claim to stand as a distinct species. Capt. Swayne, in his lately published ‘Seventeen Trips to Somaliland,’ gives us the following notes on his experiences with the _Gussuli_, as the Somalis call this Antelope:--“I came on _Gussuli_ for the first time about a day’s journey south of Seyyid Mahomed’s village in the Malingúr tribe, and found it to exist all over the Rer Amáden country. Its range coincides nearly with that of the rhinoceros, and it is found, like the latter animal, in parts of the Haud, where its ground overlaps with the range of the _Gol-Ass_. The _Gussuli_ is if anything slightly larger than the _Gol-Ass_, and of a dead grey colour, with a white belly. The female appears to be much larger than the male; and it is a pretty safe rule, when trying to shoot the buck of a pair, to aim at the smaller one.