Bowlike see arc arcuate

box n.; pl. boxes [A.S., fr. 1. buxus, boxwood] (MOLL: Bivalvia) A pair of empty, attached hinged (valves) shells of oysters.

brachelytra n.pl. [Gr. brachys, short; elytron, sheath] (AR-THRO: Insecta) Having shortened wing covers or elytra. brachelytrous a.

brachia n.pl. [L. brachium, arm] 1. Processes like arms. 2. (ARTHRO: Insecta) a. Paired, unfused processes resembling arms surrounding the aedeagus; clasper; paramere. b. A tracheal or blood gill. 3. (BRACHIO) see brachidium.

brachial a. [L. brachium, arm] 1. Pertaining to an arm-like process or appendage. 2. (ARTHRO: Insecta) Pertaining to the fore wing.

brachial canal (CNID: Scyphozoa) A canal in the oral arm of medusae.

brachial basket (ARTHRO: Insecta) In Odonata, a barrel-like chamber in the anterior two-thirds of the rectum that functions by the intake and expulsion of water; rectal gills.

brachial valve (BRACHIO) A valve containing any skeletal support for the lophophore, generally smaller than the pedicle valve; dorsal valve.

brachidium n.; pl. brachidia [L. dim. brachium, arm] (BRACHIO) The internal skeleton or brachial support for the lophophore, consisting of a calcareous loop or spire.

brachiolaria n.; pl. -lariae [L. dim. brachium, arm] (ECHINOD: Asteroidea) The free-swimming, ciliated larva that develops from the bipinnaria and is characterized by three additional arms extending from the anterior part of the ventral surface, anterior to the preoral loop.

brachiole n. [L. dim. brachium, arm] (ECHINOD: Crinoidea) The slender arm or arms extending from the ambulacral groove.

brachiophores n. [L. brachium, arm; Gr. phorein, to bear] (BRACHIO) Blades of the secondary shell projecting from the side of the notothyrium and forming anteromedian boundaries of sockets in some brachial valves.

Brachiopoda, brachiopods n.; n.pl. [Gr. brachys, short; pous, foot] A phylum of relatively small, solitary coelo-mates enclosed within a bivalved shell and usually attached to the substrate by a pedicle; common called lamp shells; brachiopods have one of the longest and best recorded fos sil histories in the animal kingdom.

brachitaxis n.; pl. -taxes [Gr. brachium, arm; taxis, arrangement] (ECHINOD: Crinoidea) A series of brachials extending from radial or biradial to the distal extremity of the arm.

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