Mononychus pseudacori, stridulation of.

Monotremata, development of the nictitating membrane in; lactiferous glands of; connecting mammals with reptiles.

Monstrosities, analogous, in man and lower animals; caused by arrest of development; correlation of; transmission of.

Montagu, G., on the habits of the black and red grouse; on the pugnacity of the ruff; on the singing of birds; on the double moult of the male pintail.

Monteiro, Mr., on Bucorax abyssinicus.

Montes de Oca, M., on the pugnacity of male Humming-birds.

Monticola cyanea.

Monuments, as traces of extinct tribes.

Moose, battles of; horns of the, an incumbrance.

Moral and instinctive impulses, alliance of.