Note 7 — Chapter I · —INTRODUCTION.

Féré, Comptes-rendus Société de Biologie, July 30, 1898. We may perhaps connect this with an observation of E. Selous (Zoölogist, May and Sept., 1901) on a bird, the Great Crested Grebe; after pairing, the male would crouch to the female, who played his part to him; the same thing is found among pigeons. Selous suggests that this is a relic of primitive hermaphroditism. But it may be remembered that in the male generally sexual intercourse tends to be more exhausting than in the female; this fact would favor a reversion of their respective parts.