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Of a slate color.

Half crustaceous; partially crustaceous.

Set with, or consisting of, bristles; bristly; as, a stiff, setaceous tail.

Occurring beneath a crust or scab; as, a subcrustaceous cicatrization.

Same as Supracretaceous.

Lying above the chalk; Supercretaceous.

Invertebrate animals covered with shells, especially mollusks; shellfish.

Onr of the Testacea.

The science which treats of testaceans, or shellfish; the description of shellfish. [R.]

The science of testaceous mollusks; conchology. [R.]

Having a dull red brick color or a brownish yellow color. Testaceous animals (Zoöl.), animals having a firm, calcareous shell, as oysters and clams, thus distinguished from crustaceous animals, whose shells are more thin and soft, and consist of several joints, or articulations, as lobsters and crabs.…

Of, pertaining to, or resembling, a trout; as, fish of the truttaceous kind.

The posterior section of the body, behind the thorax, in insects, crustaceans, and other Arthropoda.

Without claws on the feet (of crustaceous animals).

A numerous group of fourteen -- footed Crustacea, inhabiting both fresh and salt water. The body is usually compressed laterally, and the anterior pairs or legs are directed downward and forward, but the posterior legs are usually turned upward and backward. The beach flea is an example. See Tetradecapoda and Arthrostr…

A division of Crustacea, which, in some its characteristics, is intermediate between Amphipoda and Isopoda.

A group of decapod Crustacea, of which the hermit crab in an example.

Irregular in the character of the tail or abdomen; as, the anomural crustaceans. [Written also anomoural, anomouran.]

A movable, articulated organ of sensation, attached to the heads of insects and Crustacea. There are two in the former, and usually four in the latter. They are used as organs of touch, and in some species of Crustacea the cavity of the ear is situated near the basal joint. In insects, they are popularly called horns,…

A small antenna; -- applied to the smaller pair of antennæ or feelers of Crustacea.