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 might, the young ones, so long oppressed, rebel, and assassinate this tyrannous father. We must here remark, that whatever the form of sexual association among mammals, the male has always much less affection for the young than the female. Even in monogamous species, when the male keeps with the female, he does so more as chief than as father. At times he is much inclined to commit infanticides and to destroy the offspring, which, by absorbing all the attention of his female, thwart his amours. Thus, among the large felines, the mother is obliged to hide her young ones from the male during the first few days after birth, to prevent his devouring them.

I shall here conclude this very condensed study of sexual association and the family in the animal kingdom. My object is not so much to exhaust the subject, as to bring into relief the analogies existing between man and the other species. The facts which have been cited are amply sufficient for this purpose, and we may draw the following general conclusions from them:—

In the first place there is no premeditated design in nature; any mode of reproduction of sexual association and of rearing of young that is compatible with the duration of the species may be adopted. But in a general manner it may be said that a sort of antagonism exists between the multiplicity of births and the degree of protection bestowed on the young by the parents.

A rough outline of the family is already found in the animal kingdom; it is sometimes patriarchal, as with sticklebacks, etc., but most often it is matriarchal. In the latter case the female is the centre of it, and her love for the young is infinitely stronger and more devoted than that of the male. This is especially true of mammals, with whom the male is generally an egoist, merely protecting the family in his own personal interest.

The familial instinct, more or less developed, exists in the greater number of vertebrates, and in many invertebrates. From an early period it must have been an object of selection, since it adds considerably to the chances of the duration of the species. With some species (ants, bees, termites) this instinct has expanded into a wide social love, resulting in the production of large societies of