The hardened forewings of Beetles, serving as sheaths for the membranous hind-wings, which constitute the true organs of flight.

The young animal undergoing development within the egg or womb.

The study of the development of the embryo.

Peculiar to a given locality.

A division of the class Crustacea, having all the segments of the body usually distinct, gills attached to the feet or organs of the mouth, and the feet fringed with fine hairs. They are generally of small size.

The earliest of the three divisions of the Tertiary epoch of geologists. Rocks of this age contain a small proportion of shells identical with species now living.

Insects allied to the Mayfly.

The totality of the animals naturally inhabiting a certain country or region, or which have lived during a given geological period.

The Cat-family.

Having become wild from a state of cultivation or domestication.

The totality of the plants growing naturally in a country, or during a given geological period.

Flowers imperfectly developed in some respects, and collected into a dense spike or head, as in the Grasses, the Dandelion, etc.

Of or belonging to the foetus, or embryo in course of development.