Search the Dictionary

The segment next to the flagellum of the antennæ of Crustacea.

The sixth joint of a typical leg of a crustacean; usually, the penultimate joint.

portion, or two proximal and more or less consolidated segments, of an appendage of a crustacean.

A genus of American Cretaceous pterodactyls destitute of teeth. Several species are known, some of which had an expanse of wings of twenty feet or more.

The caudal plate of trilobites, crustacean, and certain insects. See Illust. of Limulus and Trilobite.

Having feet or legs that are used as oars; -- said of certain crustaceans and insects.

ilian age (Geol.), that part of geological time comprising the Triassic, Jurassic, and Cretaceous periods, and distinguished as that era in which the class of reptiles attained its highest expansion; -- called also the Secondary or Mezozoic age.

A division of Pectostraca including saclike parasites of Crustacea. They adhere by rootlike extensions of the head. See Illusration in Appendix.

aniline. (Chem.) Same as Rosaniline. -- Rose apple (Bot.), the fruit of the tropical myrtaceous tree Eugenia Jambos. It is an edible berry an inch or more in diameter, and is said to have a very strong roselike perfume. -- Rose beetle. (Zoöl.) (a) A small yellowish or buff longlegged beetle (Macrodactylus subspinosu…

The anterior, often spinelike, prolongation of the carapace of a crustacean, as in the lobster and the prawn.

An extinct order or suborder of bivalve mollusks characteristic of the Cretaceous period; -- called also Rudista. See Illust. under Hippurite.

on we may bring. Salve to thy sores. Milton. Salve bug (Zoöl.), a large, stout isopod crustacean (Æga psora), parasitic on the halibut and codfish, -- used by fishermen in the preparation of a salve. It becomes about two inches in length.

scatters the seeds. See Illust. of Regma. -- Sand bug (Zoöl.), an American anomuran crustacean (Hippa talpoidea) which burrows in sandy seabeaches. It is often used as bait by fishermen. See Illust. under Anomura. -- Sand canal (Zoöl.), a tubular vessel having a calcareous coating, and connecting the oral ambulacral…

Bearing sarments; sarmentaceous.

e Ammonite family and having a chambered boat-shaped shell. Scaphites are found in the Cretaceous formation.

A flattened plate or scale attached to the second joint of the antennæ of many Crustacea.

A thin leafike appendage (the exopodite) of the second maxilla of decapod crustaceans. It serves as a pumping organ to draw the water through the gill cavity.

The hard integument of Crustacea.

An amphipod crustacean; as, the skeleton screw (Caprella). See Sand screw, under Sand. Archimedes screw, Compound screw, Foot screw, etc. See under Archimedes, Compound, Foot, etc. -- A screw loose, something out of order, so that work is not done smoothly; as, there is a screw loose somewhere. H. Martineau. -- Endle…

Any swimming amphipod crustacean. Storm scud. See the Note under Cloud.