1871.] SPEKe's ANTELOPE AND ALLIED TRAGELAPHI. 485 



and horns brought by Mr. Green from Lake N'gami, and presented 

 to the British Museum. The result of this comparison is, that I 

 have no doubt that all these specimens belong to one and the same 

 species. With respect to the Biafra specimen, I am confirmed by 

 Capt. Allen's remarks on the subject. He says (P. Z. S. 1848, 

 p. 88), "It was, I should think, about 3 feet high, or rather more, 

 of a darkish brown colour." The locality where he obtained it he 

 describes as "pestiferous and foggy," most truly characteristic of 

 the resorts of this remarkable animal. 



In still further corroboration of this opinion, I find a horn in the 

 British Museum that I consider unquestionably to belong to this 

 species, labelled " (Parzudaki) Gaboon," also a skin, horns, and 

 feet, beyond any doubt of a Speke's Antelope, which specimen Mr. 

 Gerrard informs me was sent by M. du Chaillu from Gaboon, in 

 1865, to Mr. John Murray of Albemarle Street, and brought by 

 Mr. Gerrard from Mr. Murray's to the British Museum. Should 

 the distribution of an Antelope so specially adapted to a life amongst 

 swampy and marshy regions be found to extend from the Victoria 

 Nyanza on the east to the Cameroon and Gaboon country on the 

 west, and thence to Lake N'gami on the south, it will, 1 think, be a 

 matter of some interest, as it will indicate the probability that large 

 parts of unexplored equatorial Africa are suitable to the habits of 

 this lake- and swamp-loving Antelope. 



The following diagnoses* will, I hope, afford characters for di- 

 stinguishing these three species of Trayelaphus : — 



A. Hair of sides smooth and short, striped with white bands, de- 



scending from a white dorsal streak. Hoofs short. 



a. General colour deep chestnut ; stripes strongly marked, 



numerous. Horns smooth, massive. Keck, back, and 

 belly maneless. Tail bovine. Fore limbs with dark 

 markings anteriorly T, ewryceros. 



b. General colour dark bluish grey ; stripes i'ew, faintly 



marked. Horns rough, moderate. Neck, back, and 

 belly maned. Tail cervine and hairy. Fore limbs 

 rich tan below the knees T. angasii. 



B. Hair of sides coarse and long, without stripes. Hoo!'s long. 



c. General colour rusty brown. Keck maned. Horns 



smooth, slender, strongly keeled. Hair of sides and 



body of uniform length T. spekii. 



The synonymy of these three species, so far as I have been able 

 to examine it, appears to stand as follows : — 



1. Tragelaphus spekii. 



1848. Antelope from Biyht of Biafra, Allen, P. Z. S. 1848, p. 88. 

 1850. Strepsiceros, sp. 1, Turner, P. Z. S. 1850, p. 171. 

 1852. Tragelaphus euryceros, var. I, Gray, Cat. Mam. B. M. 

 1852, p. 137. 



1856. NaJiony, Anderssou, Lake N'gami, p.- 449. 



* These diagnoses only apply to the males of each species, the females of T. 

 eros and angasii Una; unknown. 



