C «AP. XVIII. 
DEVELOPMENT OF HAIR. 
285 
the rams alone of the above-mentioned African breed of 
sheep, is a true secondary sexual character, for it is not 
developed, as I hear from Mr. Winwood Kendo, if the 
'Rhinal be castrated. Although we ought to be ex- 
Keinely cautious, as shewn in my work on ‘ Variation 
Under Domestication,’ in concluding that any character, 
e ven with animals kept by semi-civiliscd people, has 
hot been subjected to selection by man, and thus aug- 
mented ; yet in the cases just specified this is im- 
probable, more especially as the characters are confined 
fo the males, or are more strongly developed in them 
than in the females. If it were positively known that 
the African ram with a mane was descended from the 
s *tme primitive stoclc with the other breeds of sheep, 
0l ' the JBerbura male-goat with his mane, dewlap, &c., 
k'om the same stock with other goats ; and if selee- 
t) on has not been applied to these characters, then 
they must be due to simple variability, together with 
s exually-limited inheritance. 
In this ease it would appear reasonable to ex- 
tend the same view to the many analogous characters 
°ccurring in animals under a state of nature. Never- 
theless I cannot persuade myself that this view is 
applicable in many cases, as in that of the extraordi- 
nary development of hair on the throat and fore-legs 
°f the male Ammotragus, or of the immense beard of 
the male Pithecia. With those antelopes in which the 
niale when adult is more strongly-coloured than the 
t e nrale, and with those monkeys in which this is like- 
wise the case, and in which the hair on the face is of a 
different colour from that on the rest of the head, being 
Arranged in the most diversified and elegant manner, 
*t seems probable that the crests and tufts of hair have 
° u the practice of selection by semi-civilised people. For the Berbuva 
Seat, see Dr. Cray, ‘ Catalogue,’ ibid. p. 157. 
