Anomoura (Gr. anomos, irregular, and oura, a tail). A section of crustaceous animals distinguished like the Hermit crabs, by the irregular form of the tails.
Annelid. The Anglicised singular of annelleta.
Adductor muscles, are those which hold together the shell of a bivalve, such as the Oyster, Mussel, &c.
Animalcules. Those extremely small animals which are invisible to the naked eye.
Antenna (from the Latin for yard-arm). Applied to the jointed feelers or horns upon the head of insects and crustacea.
Balanoids (Gr. balanos, an acorn). A family of Sessile cirripeds, the shells of which are commonly called Acorn-shells.
Bivalve. When a shell consists of two parts, closing like a double door. The mollusca so protected are commonly called bivalves, as the Mussel.
Brachyura (Gr. brachus, short; oura, tail). The tribe of crustacea with short tails, as the Crabs.
Branchiæ The gills or respiratory organs which extract the oxygen from air contained in water, as in fishes and other aquatic animals.
Buccal (L. bucca, mouth). Belonging to the mouth.