In 1895 Capt. Lugard during his expedition to Bornu obtained a skin and two skulls of this Antelope at Lukoja on the Niger, and presented them to the British Museum. It was the examination of Capt. Lugard’s specimens that first convinced Thomas that the Uganda Kob (subsequently named _Cobus thomasi_) belongs to a different species. The specimens previously in the National Collection (a male and female from the Gambia, collected by Whitfield) were both immature, and consequently of little use for accurate comparison. Our figure of Buffon’s Kob (Plate XL.) was lithographed for Sir Victor Brooke by Smit from a coloured drawing by Wolf, but we have not been able to ascertain from what specimen the drawing was originally taken. _December, 1896._ [Illustration: THE BOOK OF ANTELOPES, PL. XLI. _J. Smit del. & lith._ _Hanhart imp._ The Poku. COBUS VARDONI. _Published by R. H. Porter._] 67. THE POKU. COBUS VARDONI (LIVINGST.). [PLATE XLI.] _Antilope vardoni_, =Livingstone=, Miss. Trav. p. 256 (Barotse valley), and pl. p. 71 (1857). _Heleotragus vardonii_, =Kirk=, P. Z. S. 1864, p. 657 (Zambesia). _Cobus vardoni_, =Selous=, P. Z. S. 1881, p. 759, pl. lxv.; =id.= Hunter’s Wand. pp. 111, 147, 219, pl. v. (1881) (Chobe); =Ward=, Horn Meas. (1) p. 92 (1892), (2) p. 129 (1896); =Sclater=, P. Z. S. 1892, p. 98; =id.= P. Z. S. 1893, p. 728 (Lake Mweru). _Eleotragus vardoni_, =Huet=, Bull. Soc. Acclim. 1887, p. 48; =Matschie=, SB. Ges. nat. Fr. Berl. 1891, p. 138. _Kobus vardoni_, =Nicolls & Egl.= Sportsm. S. Afr. p. 43, pl. viii. fig. 30 (1892). _Adenota vardoni_, =Matschie=, Säug. Deutsch. Ost-Afr. p. 126 (1895). VERNACULAR NAMES:--_Pookoo_, _Poku_, or _Puku_ throughout its range; _Impookoo_ of the Masubias (_Selous_); _Sawwula_ of Kinyamwesi (_Böhm_, fide _Matschie_). Size and general characters almost exactly as in _C. thomasi_, but the legs entirely without any trace of the black markings so conspicuous in _C. kob_ and _C. lechee_. Height at withers of an adult male 35½ inches, female the same. Back of ears fulvous, their extreme tips edged with black. Pasterns hairy, scarcely any trace of a white ring above hoofs. Horns thick and strongly curved, having a length of about 17 or 18 inches. _Female._ Similar, but hornless. Skull measurements (♂):--Basal length 11 inches, greatest breadth 4·47, muzzle to orbit 7·25. _Hab._ Valleys of Chobe and Zambesi, and northwards through the Barotse country to Lake Mweru.