Brush-like scales of male Mallotus.
(Further facts on courtship of fishes, and the
spawning of Macropus.
Dufossé on the sounds made by fishes.
Belt on a frog protected by bright colouring.
Further facts on mental powers of snakes.
Sounds produced by snakes; the rattlesnake.
Combats of Chameleons.
Marshall on protuberances on birds' heads.
Further facts on display by the Argus
pheasant.
Attachment between paired birds.
Female pigeon rejecting certain males. (Albino birds not finding partners, in a state of nature.
Direct action of climate on birds' colours. (Further facts on the ocelli in the Argus pheasant.
Display by humming birds in courtship. (Cases with pigeons of colour transmitted to one sex alone.
Taste for the beautiful permament enough to allow of sexual selection with the lower animals.
Horns of sheep originally a masculine
character.
Castration affecting horns of animals.
Prong-horned variety of Cervus virginianus.
Relative sizes of male and female whales and
seals.
Absence of tusks in male miocene pigs.
Dobson on sexual differences of bats.
Reeks on advantage from peculiar colouring. (Difference of complexion in men and women of an African tribe.
Speech subsequent to singing.
(Schopenhauer on importance of courtship to mankind.
Revision of discussion on communal marriages and promiscuity.
Power of choice of woman in marriage, amongst savages.
(Long-continued habit of plucking out hairs may produce an inherited effect.