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A crustacean larva having three pairs of locomotive organs (corresponding to the antennules, antennæ, and mandibles), a median eye, and little or no segmentation of the body.

Any crustacean of the genus Remipes.

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.

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

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

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

ally, 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.

A crustacean, some of whose feet serve as oars.

One of the thoracic legs of a crustacean. See Illust. of Crustacea.

ch, the rosefish. -- Red-bellied perch, the long-eared pondfish. -- Perch pest, a small crustacean, parasitic in the mouth of the perch. -- Silver perch, the yellowtail. -- Stone, or Striped, perch, the pope. -- White perch, the Roccus, or Morone, Americanus, a small silvery serranoid market fish of the Atlantic c…

A crustacean gill composed of lamellæ.

One of the abdominal legs of a crustacean. See Illust. under Crustacea.

Any one of the gills of a crustacean that is attached to the side of the thorax.

One of lateral processes of a somite of a crustacean.

The eyestalk of a crustacean.

Having numerous facets; -- said of the compound eyes of insects and crustaceans.

That part of a crustacean behind the cephalothorax; -- more commonly called abdomen.

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