Herr Matschie, in his valuable volume on the Mammals of the German Protectorate, includes this Antelope in his list, and gives a figure of it in the text. He tells us that it was met with in Southern Masailand, south-east of Irangi, by Stuhlmann, and in Northern Ugogo, between Mpapwa and Usandawe, by Neumann. This, so far as we know, gives its furthest extension south. We are not aware that the Tufted Beisa has ever been imported alive to Europe. The typical head of _Oryx callotis_ already mentioned is the only example of this form of Oryx in the collection of the British Museum. _May,_ 1899. GENUS III. ADDAX. Type. _Addax_, =Rafinesque=, Analyse de la Nature, p. 56 (1815) A. naso-maculatus. General characters as in _Oryx_, but with the horns spirally twisted; the hoofs expanded as in the Reindeer; a distinct, though short, mane on the forehead and sides of the neck; the hair along the middle line of the back not projecting towards the head; tail-tuft smaller. _Range of the Genus._ North Africa, from Dongola to Senegal. [Illustration: THE BOOK OF ANTELOPES, PL. LXXXVI. _Wolf del. Smit lith._ _Hanhart imp._ The Addax. ADDAX NASO-MACULATUS. _Published by R. H. Porter._ ] 118. THE ADDAX. ADDAX NASO-MACULATUS (Blainv.). [PLATE LXXXVI.] _Cerophorus_ (_Gazella_) _naso-maculata_, =De Blainville=, Bull. Soc. Philom. 1816, pp. 75 & 78. _Antilope naso-maculata_, =Desm.= N. Dict. d’Hist. Nat. (2) ii. p. 188 (1816); =Blainville=, Oken’s Isis, 1819, p. 1095, pl. xii. figs. 4–7; =id.= Journ. Phys. 1819, pls., figs. 4 & 7; Desm. Mamm. ii. p. 456 (1822); =Goldf.= Schr. Säug. v. p. 1242 (1824 or 1818); =Licht.= Abh. Ak. Berl. 1824, p. 215; =Less.= Man. Mamm. p. 374 (1827); =J. B. Fisch.= Syn. Mamm. p. 462 (1829); =Laurill.= Dict. Univ. d’H. N. i. p. 617 (1839); =Huet=, Bull. Soc. Acclim. (4) iv. p. 269 (1887). _Antilope addax_, =Cretzschm.= Zool. Atl. Rüpp. Reise, p. 19, pl. vii. (1826); =Licht.= Darst. Säug. pl. ii. (1827); =H. Sm.= Griff. An. K. iv. p. 193, pl., v. p. 328 (1827); =Hempr. & Ehrb.= Symb. Phys. Decas ii. pl. iv. (1828); =J. B. Fisch.= Syn. Mamm. p. 474 (1829); =Oken=, Allg. Naturg. vii. p. 1379 (1838); =Wagn.= Sehr. Säug. Suppl. iv. p. 486 (1844), v. p. 437 (1855); =Reichenb.= Säug. iii. p. 118, pl. xxxvi. (1845); =Schinz=, Syn. Mamm. ii. p. 438 (1845); =id.= Mon. Antil. p. 36, pls. xl. & xli. (1848); =Gieb.= Säug. p. 296 (1853); =Schweinf.= Herz von Afrika, ii. p. 534 (1874). _Addax suturosus_, =Fitz.= SB. Wien, lix. p. 178 (1869).