The Descent of Man and Selection in Relation to Sex, Vol. II (1st Edition)
CHAPTER XVII.
SECONDARY SEXUAL CHARACTERS OF MAMMALS.
The law of battle--Special weapons, confined to the males--Cause of absence of weapons in the female--Weapons common to both sexes, yet primarily acquired by the male--Other uses of such weapons--Their high importance--Greater size of the male--Means of defence--On the preference shewn by either sex in the pairing of quadrupeds 239-273