1905. ] ON THE WHITE-MANED SEROW. 329 
for the West African White-thighed Guereza (C. vellerosus), text- 
fig. 58, appears to exhibit a kind of retrograde development in 
these respects. The body, for instance, has entirely lost the mantle 
of long white hair and the tail its white “flag,” while the white of 
the perineal patch has spread on to the hinder and outer sides of 
the thighs. In this case we find, indeed, a practical reversion to 
the type of the Black Guereza, with the exception that the band 
on the forehead, the sides of the face and throat, the thighs, and 
almost the whole of the tail have become white, while the long 
hair has entirely disappeared from the face. 
That the colouring and special development of the long hair in 
the White-tailed Guereza form a protective modification, there 
seems to be little doubt. Whether, however, the colour-phases 
and hair-growth in the other forms are of a protective nature, or 
are merely due to what is commonly called sexual selection, must 
be left for those to decide who have the opportunity of seeing 
these beautiful monkeys in their native haunts. 
2. The White-maned Serow. By R. LypEeKKeEr. 
[Received November 11, 1905. | 
(Plate VIII.*) 
In 1888 the very appropriate name of Vemorhedus argyrochetes 
was bestowed by the Rev. Pére Heude* on a large and strikingly 
coloured species of Serow inhabiting the mountains of Central 
China in the neighbourhood of Che-kiang in the Upper Yang-tse- 
kiang district. Later, a fuller notice, with a figure of the skull, 
was given by the same writer; while in 1890 Dr. A. Henry $ 
contributed a note on skins of the species which had come under 
his notice while in China. Hitherto, however, so far as I am 
aware, no coloured figure of the entire animal has appeared ; 
and since the colouring is of a very remarkable and striking type, 
somewhat different from that of the ordinary Serow, I think the 
opportunity ought to be taken of remedying this deficiency. 
This opportunity has heen afforded by the recent addition to 
the Collection of the British (Natural History) Museum of a 
mounted male specimen of this Serow and of the Tibetan Takin ~ 
(Budorcas taxicolor tibetana). They were acquired by Rowland 
Ward, Ltd., from a French dealer, by whom they were stated to 
have come from Tibet; but I should think that Sze-chuen, or 
thereabouts, is more probably their place of origin, unless, indeed, 
the Serow was procured still farther east. The two are, I believe, 
the first representatives of their respective kinds ever received in 
England, and it is quite probable that in the case of the Serow 
this statement may be extended to European museums in general. 
* For explanation of the Plate, see p. 331. 
+ Mém. Hist. Nat. Emp. Chinois, vol. ii. p. 4, note (1888). 
t T. ce. p. 228, pl. xxxi. (1890). 
§ Proc. Zool. Soc. London, 1880, p. 93. 
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