When at St. Petersburg in August 1897, Sclater had the opportunity of examining, under the kind guidance of Herr Büchner, the fine series of specimens of this Antelope in the Zoological Museum of the Imperial Academy of Sciences of that city. The specimens had been obtained in the region of the Koko Nor, in the most northern part of the Chinese province of Kan-su, and in Ordos, which is the country encompassed by the great northern bend of the River Hoang-Ho. In the southern part of this district Przewalski’s Gazelle was met with in great numbers during the Kan-su expedition already mentioned, and many specimens of it were obtained for the Imperial Museum at St. Petersburg. _January,_ 1898. [Illustration: THE BOOK OF ANTELOPES, PL. LIV _Wolf del J Smit lith._ _Hanhart imp._ The Mongolian Gazelle GAZELLA GUTTUROSA _Published by R H Porter_] 84. THE MONGOLIAN GAZELLE. GAZELLA GUTTUROSA (PALL.). [PLATE LIV.] _Caprea campestris gutturosa_, =J. G. Gmel.= N. Comm. Petrop. v. p. 347, pl. ix. (1760). _Antilope gutturosa_, =Pall.= Spic. Zool. fasc. xii. p. 46, t. ii. (1777); =Zimm.= Geogr. Gesch. ii. p. 120 (1780); =Herm.= Tabl. Affin. Anim. p. 108 (1783); =Bodd.= Elench. Anim. p. 143 (1785); =Schreb.= Säug. pl. cclxxv. (1787); =Gmel.= Linn. S. N. i. p. 186 (1788); =Kerr=, Linn. An. K. p. 310 (1792); =Donnd.= Zool. Beytr. i. p. 627 (1792); =Latham & Davis=, Faunula Indica, p. 4 (1795); =Link=, Beytr. Nat. ii. p. 99 (1795); =Bechst.= Uebers. vierf. Th. ii. p. 645 (1800); =Shaw=, Gen. Zool. ii. pt. 2, p. 342 (1801); =Turt.= Linn. S. N. i. p. 113 (1802); =G. Cuv.= Dict. Sci. Nat. ii. p. 228 (1804); =Desm.= N. Dict. d’H. N. (1) xxii. p. 499, xxiv. Tabl. p. 33 (1804); =Pall.= Zoogr. Ross.-As. i. p. 251 (1811); =Licht.= Mag. nat. Freund. Berl. vi. p. 171 (1814); =G. Fisch.= Zoogn. iii. p. 431 (1814); =Afzel=, N. Act. Ups. vii. p. 220 (1815); =Desm.= N. Dict. d’H. N. (2) ii. p. 182 (1816); =G. Cuv.= Règne Anim. i. p. 260 (1817); =Goldf.= Schr. Säug. v. p. 1221 (1818); =Schinz=, Cuv. Thierr. i. p. 387 (1821); =Desmoul.= Dict. Class. i. p. 441 (1822); =Desm.= Mamm. ii. p. 452 (1822); =H. Sm.= Griff. An. K. iv. p. 229, v. p. 336 (1827); =Less.= Man. Mamm. p. 371 (1827); =J. B. Fisch.= Syn. Mamm. p. 458 (1829); =Oken=, Allg. Nat. vii. p. 1267 (1838); =Laurill.= Dict. Univ. i. p. 615 (1839); =Gerv.= Dict. Sci. Nat. Suppl. i. p. 260 (1840); =Less.= N. Tabl. R. A., Mamm. p. 176 (1842); =Wagn.= Schr. Säug. Suppl. iv. p. 416 (1844), v. p. 408 (1855); =Reichenb.= Säug. iii. p. 104, pl. xxxi. fig. 180 (1845); =Schinz=, Syn. Mamm. ii. p. 409 (1845); =id.= Mon. Antil. p. 11, pl. x. (1848); =Sund.= Pecora, K. Vet.-Ak. Handl. 1845, p. 270 (1847); =id.= Hornschuch’s Transl., Arch. Skand. Beitr. ii. p. 266; Reprint, p. 86 (1848); =Gieb.= Säug. p.