If we assume, as is probable, that the Hartebeest of the Bahr-el-Ghazal belongs to this species, the first examples of it sent to Europe would be those obtained by Petherick in 1859, which were referred by the late Dr. Gray to the Bubal of North Africa. Of these specimens the only one retained by the British Museum is the skull of a female. Another similar specimen from the Bahr-el-Ghazal was sent to the British Museum in 1884 by the German collector Bohndorff. Heuglin also (Reise N.O.-Afr. ii. p. 123) has spoken of the occurrence, on the Kir and Sobat rivers, of a Hartebeest allied to _B. caama_ of South Africa. It is quite clear, therefore, that either Jackson’s Hartebeest or a species closely allied to it is found in the White-Nile district, although we must await the arrival of fresh specimens from this country and further information before we can decide exactly what this Hartebeest is. It is also probable that the “Central African Hartebeest” of Dr. Schweinfurth’s ’Im Herzen von Africa,’ and Junker’s “_Bubalis caama_,” met with in the Niam-Niam country, on the northern tributaries of the Congo, should both be referred to _Bubalis jacksoni_. Thomas’s original characters of _Bubalis jacksoni_ were based on a specimen transmitted by Mr. Jackson to Messrs. Rowland Ward & Co., shot in November 1889 in Northern Kavirondo, which is now in the British Museum. In a note accompanying the specimen, in which he expresses a sagacious doubt as to “its being the same as the South-African animal,” Mr. Jackson adds:--“Up north all along the top of the Elgeyo Escarpment (continuation of Mau) into Turquel to the north and north-east of Mount Elgon it is very common, and takes the place of _B. cokei_. Round Baringo it is fairly plentiful, but some marches south of Njemps _B. cokei_ takes its place.” Mr. Ernest Gedge, who accompanied Mr. Jackson in his adventurous expedition, has kindly furnished us with the following excellent field-notes on this Antelope:-- “The first specimens of Jackson’s Hartebeest were obtained on the Mau plateau in British East Africa. This plateau extends in a northern and southerly direction through the Masai country, and varies from 8000 to 9000 feet in elevation.