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A cactaceous plant (Nopalea cochinellifera), originally Mexican, on which the cochineal insect feeds, and from which it is collected. The name is sometimes given to other species of Cactaceæ.

A name for certain crustaceous marine algæ which secrete carbonate of lime on their surface, and were formerly thought to be of animal nature. They are now considered corallines of the genera Melobesia and Lithothamnion.

Any crustacean of the genus Remipes.

A subdivision of Cetacea, including the sperm whale, dolphins, etc.; the toothed whales.

A compound eye, as of insects and crustaceans.

One of the single eyes forming the compound eyes of crustaceans, insects, and other invertebrates.

The part of the carapace of a crustacean situated behind the cervical groove.

One of the plates which in some Crustacea inclose a cavity wherein the eggs are hatched.

An eyestalk; the organ which bears the compound eyes of decapod Crustacea.

A genus of cactaceous plants; the prickly pear, or Indian fig.

Any species of amphipod crustacean of the genus Orchestia, or family Orchestidæ. See Beach flea, under Beach.

Of or pertaining to an oyster, or to a shell; shelly. The crustaceous or ostreaceous body. Cudworth.

A West Indian name for a myrtaceous tree (Jambosa Malaccensis) which bears crimson berries.

Egg-bearing; -- applied particularly to certain receptacles, as in Crustacea, that retain the eggs after they have been excluded from the formative organs, until they are hatched.

Any one of a tribe of anomuran crustaceans, of which Pagurus is a type; the hermit crab. See Hermit crab, under Hermit.

guished from kenogenesis. Sometimes, in zoölogy, the abrupt metamorphosis of insects, crustaceans, etc.

, one of the jointed sense organs attached to the mouth organs of insects, arachnids, crustaceans, and annelids; as, the mandibular palpi, maxillary palpi, and labial palpi. The palpi of male spiders serve as sexual organs. Called also palp. See Illust. of Arthrogastra and Orthoptera.

One of the two lobes which form the lower lip, or metastome, of Crustacea.

One of the outer divisions of an endosternite of Crustacea. -- Par`a*phrag"mal, a.

A division of copepod Crustacea, having a sucking mouth, as the lerneans. They are mostly parasites on fishes. Called also Siphonostomata.