Breccia, a rock made up of angular fragments cemented together. Bronze, an alloy of copper, with from ten to thirty per cent. of tin, to which other metals are sometimes added. Calcareous, consisting of, or containing, carbonate of lime. Calcined, reduced to a powder, or friable state, by the action of heat. Carbonate, a salt formed by the union of carbonic acid with a base. Carnivora, an order of animals which subsist on flesh. Carpal, that portion of the skeleton pertaining to the wrist. Cataclysm, a deluge. Celt, one of an ancient race of people who formerly inhabited a great part of Central and Western Europe; an implement made of stone or metal, found in the ancient tumuli of Europe. Cereal, edible grain. Champlain Epoch, a name derived from the beds on the borders of Lake Champlain. The beds are subsequent in origin to the glacial epoch. Chert, an impure variety of flint. Clavicle, the collar-bone. Conglomerate, rock made of pebbles cemented together. Coronoid, the process of the ulna and lower jaw. Cosmogony, the science of the origin of the world or universe. Cranium, the skull. Crannoges, small islets in the lakes of Ireland and Scotland, used by the ancients as places of habitation. Crucible, a vessel capable of enduring great heat, and used for melting ores, metals, etc. Cyclical, pertaining to a periodical space of time marked by the recurrence of something peculiar. Data (pl. of datum), a ground of inference or deduction. Debris (d[=a]-breé), fragments detached from rocks, and piled up in masses. Demi-relief, the projection of one half the figure beyond the plane from which it rises. Dendrites, a stone on which are tree-like markings. Devonian, the geological age between the Silurian and Carboniferous. Diluvium, the time when the glacial beds were deposited. Diorite, a tough rock, in color whitish, speckled with black, or greenish black. Dolichocephalic, a skull whose diameter from the frontal to the occipital bone exceeds the transverse diameter. Dorsal, the name given to the second division of the vertebræ. Drift, a collection of loose earth and bowlders, distributed during the glacial epoch over large portions of the earth's surface. Druidical, pertaining to the religious ceremonies of the ancient Celtic nations in France, Britain, and Germany. Dynasty, a succession of kings of the same line or family. Eccentricity, the distance of the centre of the orbit of a heavenly body from the centre of the body round which it revolves. Edible, eatable. Elliptical, having an oval or oblong figure. Eocene, the oldest of the three epochs of the tertiary. Epoch, any period of time marked by some particular cause or event. Esplanade, a clear space, or grass plat. Fauna, the animals of any given area or epoch.