In European menageries the Waterbuck is not usually to be met with, though there have been occasional specimens in some of the gardens in Holland and Germany. Sclater saw a pair at Amsterdam in June last. The Zoological Society of London received their first specimen of this Antelope (a male) in June 1890, and a female in May 1891. Both of these animals were obtained in British East Africa, and were presented to the Society by Mr. G. S. Mackenzie, F.Z.S. In 1893 the pair bred and a young female was born in the Menagerie on the 4th May, furnishing, so far as is known, the first instance of this animal having reproduced in captivity. The mother and young were figured by Smit in the Society’s ‘Proceedings’ for 1893, and the figures are repeated in our Plate XXXII., where a head of the male of the same pair is also introduced in the background. In the British Museum will be found a fine mounted pair of this Antelope from Mashonaland (_Selous_), and a good series of skulls from various localities, amongst which are examples from Nyasaland (_Sir H. H. Johnston_) and from the banks of the Webbe in Somaliland (_Swayne_). _August, 1896._ [Illustration: THE BOOK OF ANTELOPES, PL. XXXIII. _J. Smit del. & lith._ _Hanhart imp._ The Sing-sing. COBUS UNCTUOSUS. _Published by R. H. Porter._] 59. THE SING-SING. COBUS UNCTUOSUS (LAURILL.). [PLATE XXXIII.] _Cervus sing-sing_, =Bennett=, Rep. Counc. Z. S. L. 1832, p. 5 (nom. nud.). _Antilope sing-sing_, =Waterh.= Cat. Mamm. Z. S. L. p. 41 (1838). _Antilope koba_, =Ogilby=, Penny Cycl. i. p. 79 (1834); =id.= P. Z. S. 1836, p. 103 (_nec_ Erxl.). _Antilope unctuosa_, =Laurillard=, Diet. Un. d’H. N. i. p. 622 (1847); =Wagn.= Schreb. Säug. iv. p. 434 (1843). _Antilope defassa_, var. _senegalensis_, =Wagn.= Säug. v. p. 435 (1855). _Kolus sing-sing_, =Gray=, List Mamm. B. M. p. 159 (1843). _Kobus sing-sing_, =Gray=, Ann. Mag. N. H. (1) xviii. p. 232 (1846); =id.= Knowsl. Men. p. 15 (1850); =id.= P. Z. S. 1850, p. 131; =id.= Cat. Ung. B. M. p. 99 (1852); =id.= Cat. Rum. B. M. p. 15 (1872); =id.= Hand-l. Rum. B. M. p. 87 (1873); =Gerrard=, Cat. Bones, p. 239. _Cobus sing-sing_, =Scl.= Cat. Vert. p. 144 (1883). _Adenota sing-sing_, =Fitz.= SB. Ak. Wien, lix. pt. 1, p. 174 (1869). _Cobus defassus_, =Lyd.= Horns and Hoofs, p. 224 (1893). _Cobus defassa_, =Scl.= P. Z. S. 1892, p. 471. _Cobus unctuosus_, =Scl.= P. Z. S. 1893, p. 727. VERNACULAR NAME:--_Sing-sing_ of the natives on the Gambia (_Whitfield_).