Glossary - Page 2

seem to be organised.

ARTICULATA.--A great division of the Animal Kingdom characterised generally by having the surface of the body divided into rings called segments, a greater or less number of which are furnished with jointed legs (such as Insects, Crustaceans and Centipedes).

ASYMMETRICAL.--Having the two sides unlike.

ATROPHIED.--Arrested in development at a very early stage.

BALANUS.--The genus including the common Acorn-shells which live in abundance on the rocks of the sea-coast.

BATRACHIANS.--A class of animals allied to the Reptiles, but undergoing a peculiar metamorphosis, in which the young animal is generally aquatic and breathes by gills. (Examples, Frogs, Toads, and Newts.)

BOULDERS.--Large transported blocks of stone generally embedded in clays or gravels.

BRACHIOPODA.--A class of marine Mollusca, or soft-bodied animals, furnished with a bivalve shell, attached to submarine objects by a stalk which passes through an aperture in one of the valves, and furnished with fringed arms, by the action of which food is carried to the mouth.

BRANCHIAE.--Gills or organs for respiration in water.

BRANCHIAL.--Pertaining to gills or branchiae.

CAMBRIAN SYSTEM.--A series of very ancient Palaeozoic rocks, between the Laurentian and the Silurian. Until recently these were regarded as the oldest fossiliferous rocks.

CANIDAE.--The Dog-family, including the Dog, Wolf, Fox, Jackal, etc.

CARAPACE.--The shell enveloping the anterior part of the body in Crustaceans generally; applied also to the hard shelly pieces of the Cirripedes.

CARBONIFEROUS.--This term is applied to the great formation which includes, among other rocks, the coal-measures. It belongs to the oldest, or Palaeozoic, system of formations.

CAUDAL.--Of or belonging to the tail.

CEPHALOPODS.--The highest class of the Mollusca, or soft-bodied animals, characterised by having the mouth surrounded by a greater or less number of fleshy arms or tentacles, which, in most living species, are furnished with sucking-cups. (Examples, Cuttle-fish, Nautilus.)

CETACEA.--An order of Mammalia, including the Whales, Dolphins, etc., having the form of the body fish-like, the skin naked, and only the fore limbs developed.

CHELONIA.--An order of Reptiles including the Turtles, Tortoises, etc.

CIRRIPEDES.--An order of Crustaceans including the Barnacles and Acorn- shells. Their young resemble those of many other Crustaceans in form; but when mature they are always attached to other objects, either directly or by means of a stalk, and their bodies are enclosed by a calcareous shell composed of several pieces, two of which can open to give issue to a bunch of curled, jointed tentacles, which represent the limbs.

COCCUS.--The genus of Insects including the Cochineal. In these the male is a minute, winged fly,