(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.