_Cobus crawshayi_, =Sclater=, P. Z. S. 1893, p. 723. VERNACULAR NAME:--_Chuzwi_ of the Awembas and the people of Itawa and Kabwiri (_Crawshay_). Rather smaller in size than _C. ellipsiprymnus_, but generally resembling it, the animal being covered with the same harsh, lengthened, thinly spread hairs. But the colour is considerably darker, being of a dark iron-grey on the dorsal surface, which passes into blackish on the back of the neck, upper portion of the limbs, and tail. This colour gets gradually lighter and more greyish on the flanks, and passes on each side into whitish on the belly. There is no sign of the distinct rump-band which is so clearly marked on _C. ellipsiprymnus_, where it is bordered on each side by dark grey; but in the present species the whole anal disk is white, separated on the dorsal line by the dark medial streak which passes into the short black bushy tail. The whole length of the flat skin in the present example is about 56 inches, the length of the tail about 15 inches. Horns hardly distinguishable from those of _C. ellipsiprymnus_. Those of type 24 inches in length along the curve, and strongly ringed to near their extremities, which are about 11·5 inches apart. _Hab._ District of Lake Mweru in British Central Africa. Mr. Alfred Sharpe, F.R.G.S., H.B.M. Vice-Consul in Southern Nyasaland, has twice made expeditions into the little-known district of Lake Mweru, which lies about 100 miles west of the south end of Lake Tanganyika. On his second journey in 1892, of which he has given an excellent account in the ‘Geographical Journal’ for 1893[5], Mr. Sharpe first encountered specimens of this Waterbuck, of which he sent to Sclater the following particulars:--“The first time I saw this Waterbuck I was close to Lake Mweru on my _second_ journey there (Sept. 1892). I was only one day’s march from Crawshay’s Station[6] on the Lake, in a piece of rather dense bush, when my boys pointed out some beasts to me. From their bluish colour I thought at first they were buffaloes, but, on approaching nearer, I saw that they had the horns and general appearance of the Waterbuck (_Cobus ellipsiprymnus_) so common in Nyasaland. They were, however, not the Common Waterbuck, as, besides being much darker, they had no white ring on their buttocks. Before I could get a shot, however, they were away. [Illustration: Fig. 31. Skull and horns of _Cobus crawshayi_. (P. Z. S. 1893, p. 727.)] “On reaching Crawshay’s house at Rhodesia on the following day, one of the first things he said to me was, ‘Now I am going to tell you about a new beast that I have found here.’ I replied at once, ‘I know what it is--a new Waterbuck.’ And so it was! Subsequently I obtained and sent you home an imperfect skin of this animal.”