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The peduncle of the eyes of decapod crustaceans.

ed on a stalk, or peduncle; -- opposed to sessile-eyed. Said especially of podophthalmous crustaceans. Stalked- eyed crustaceans. (Zoöl.) See Podophthalmia.

or greenish black mineral occurring in foliated flates, also in velvety bronze-colored incrustations. It is a hydrous silicate of iron and alumina.

The second joint of a maxilla of an insect or a crustacean.

An order of Crustacea including the squillas. The maxillipeds are leglike in form, and the large claws are comblike. They have a large and elongated abdomen, which contains a part of the stomach and heart; the abdominal appendages are large, and bear the gills. Called also Gastrula, Stomatopoda, and Squilloidea.…

Any plant of the genus Chara; -- so called because they are often incrusted with carbonate of lime. See Chara.

or stones; resembling stone; hard; as, a stony tower; a stony cave; stony ground; a stony crust.

ated above, or on the dorsal side of, the esophagus; as, the supra-esophageal ganglion of Crustacea. [Written also supra- oesophagal, and supra-oesophageal.]

A dish covered with a crust of raised paste, but with no other contents. [Obs.] King. Surprise party, a party of persons who assemble by mutual agreement, and without invitation, at the house of a common friend. [U.S.] Bartlett.

A seam, or impressed line, as between the segments of a crustacean, or between the whorls of a univalve shell. Glover's suture, Harmonic suture, etc. See under Glover, Harmonic, etc.

sually bilobed, appendages, of which several pairs occur on the abdominal somites of many crustaceans. They are used as fins in swimming.

f manna. Tamarisk salt tree, an East Indian tree (Tamarix orientalis) which produces an incrustation of salt.

The foot of an insect or a crustacean. It usually consists of form two to five joints.

A reddish crust or sediment in wine casks, consisting essentially of crude cream of tartar, and used in marking pure cream of tartar, tartaric acid, potassium carbonate, black flux, etc., and, in dyeing, as a mordant for woolen goods; -- called also argol, wine stone, etc.

The terminal joint or movable piece at the end of the abdomen of Crustacea and other articulates. See Thoracostraca.

), 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.

Any species of Thalaassinidæ, a family of burrowing macrurous Crustacea, having a long and soft abdomen.

An extensive division of Crustacea, having a dorsal shield or carapec

The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs. See Illust. in Appendix.…

vision of arthropods comprising all those which breathe by tracheæ, as distinguished from Crustacea, which breathe by means of branchiæ.