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rate a more advanced stage, is represented. At the date of the sale of the 
Knowsley Menagerie in 1851 it does not seem that any specimens of this 
Antelope were left in the collection ; but a young example, no doubt one of 
those that died in the Menagerie, had been presented by Lord Derby to the 
Zoological Society of London, whence it subsequently passed into the 
collection of the British Museum. From the labels on this and other 
specimens we learn that they were obtained by Whitfield, a well-known 
collector formerly in the employment of Lord Derby, at Sierra Leone. 
Little further information respecting this species is available until 1870, 
when the Zoological Society, on March 24th, purchased a single living 
example of it from Cross of Liverpool, as recorded in the Society’s ‘ Pro- 
ceedings’ (P. Z. S. 1870, p. 220). ‘This animal, however, did not live long 
in the Society's Menagerie, as it died on the 14th July of the same year. 
Its body was disposed of to Mr. E. Gerrard, jr., by whom it was stuffed and 
sold to the Melbourne Museum. 
Skull of Cephalophus sylvicultrix, ad. 
(P. Z. 8. 1865, p. 205.) 
The only modern authority that speaks of this Antelope is Mr. Bittikofer, 
of the Leyden Museum, who made two zoological voyages to Liberia in 1880 
and 1886. In Dr. Jentink’s list of the Liberian mammals obtained by 
Mr. Biittikofer and his fellow collectors in Liberia (Notes Leyden Mus. vol. x. 
p. 20) it is recorded that Cephalophus sylvicultriz is said to occur sparingly 
on the Jackson and Mahfa rivers in that country, but to be more common on 
the Manna and Solyman rivers. But Mr. Biittikofer, in spite of all his efforts, 
did not succeed in obtaining specimens. 
Although, as already stated, originally discovered in Sierra Leone, the 
