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.
A class of animals of very low organisation and generally of small size, having a jellylike body, from the surface of which delicate filaments can be given off and retracted for the prehension of external objects, and having a calcareous or sandy shell, usually divided into chambers and perforated with small apertures.
Containing fossils.
Having a faculty of digging. The Fossorial Hymenoptera are a group of Wasp-like Insects, which burrow in sandy soil to make nests for their young.