Of or belonging to the tail.

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, Cuttlefish, Nautilus.)

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.

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

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.