Maxwell’s Duiker appears to extend from Senegal and Gambia all along the West Coast of Africa to the mouths of the Niger. From Senegal, as already mentioned, it has been received in Paris, and from the Gambia living specimens were brought by Whitfield for the Derby Menagerie. From Sierra Leone there is a specimen in the British Museum presented by Colonel Sabine, R.E., which is the type of _Cephalophus punctulatus_. In Liberia, Mr. Büttikofer tells us, Maxwell’s Duiker is unquestionably the commonest species. It is known to the Liberians under the name of “_Fulintongue_,” of which no doubt “_Philantomba_” is a corruption. Mr. Büttikofer tells us that it lives in small troops in the bush, but is very shy and difficult for the hunter to approach, so that it is generally captured in snares. Proceeding farther westwards we find that specimens of this Antelope have been transmitted to the Leyden Museum from Dabacrom, on the Gold Coast, by Pel, and to the British Museum from Fantee by the native collector Aubinn. As we are kindly informed by Herr Matschie, there are examples of this species in the Berlin Museum collected in Togo-land by Herr Baumann. Our figure of this Antelope (Plate XXI. fig. 2) was prepared by Mr. Smit many years ago under the directions of Sir Victor Brooke. It was probably taken from one of the specimens in the British Museum, but we have unfortunately no certain knowledge on this subject _August, 1895._ 33. THE BLACK-RUMPED DUIKER. CEPHALOPHUS MELANORHEUS, GRAY. Subspecies _a_. C. MELANORHEUS TYPICUS. _Cephalophus melanorheus_, =Gray=, Ann. Mag. N. H. (1) xviii. p. 167 (1846); =id.= Knowsl. Men. p. 11, pl. x. (1850); =id.= P. Z. S. 1850, p. 125; =id.= Cat. Ung. B. M. p. 88 (1852); =Temm.= Esq. Zool. Guin. pp. 194, 236 (1853); =Fitz.= SB. Wien, lix. pt. 1, p. 166 (1869); =Gray=, P. Z. S. 1871, p. 600; =id.= Cat. Rum. B. M. p. 28 (1872); =id.= Hand-l. Rum. B. M. p. 98 (1873); =Peters=, Monatsb. Ac. Berl. 1876, p. 482 (Gaboon); =Matsch.= Arch. f. Nat. 1891, pt. 1, pp. 353, 354; =Thos.= P. Z. S. 1892, p. 426; =Lyd.= Horns and Hoofs, p. 212 (1893). _Antilope (Cephalolophus) melanorheus_, =Wagn.= Schr. Säug., Suppl. v. p. 428 (1855). _Cephalophus anchietæ_, =Bocage=, P. Z. S. 1878, p. 743 (Angola). _Cephalophus maxwelli_, =Noack=, Zool. JB., Syst. iv. p. 121 (1889) (Banana, Congo) (_nec_ H. Sm.). Subspecies _b_. C. MELANORHEUS SUNDEVALLI. _Sylvicapra pygmæa_, var., =Sund.= Pecora, K. Vet.-Ak. Hand-l. 1845, p. 321 (1847); =id.= Hornschuch’s Transl., Arch. Skand. Beitr. ii. p. 313; Reprint, p. 133 (1848). _Cephalophus pygmæus sundevalli_, =Fitz.= SB. Wien, lix. pt. 1, p. 166 (1869) (_ex_ Sund.). VERNACULAR NAME:--“_Nshiri_” at Dongila, Gaboon (_Buchholz_).