6oo REPORT OF NEW JERSEY STATE MUSEUM. 



Bidentate. Two-toothed. 



Biflagellate.. With two flagella. 



Bilateral symmetry. Said of animals in which each side of body is equally 

 formed. 



Binocular. Two-eyed. 



Bipartite. In two parts. 



Biramose. Two-branched; also biramous. 



Bivalve. In two halves or valves, like an oyster shell. 



Boss. Knob or swelling. 



Bract. Thin plate. 



Branchice. Gills or respiratory organs. 



Branchial lamella. Plate gills ; as the appendages to legs in amphipods, etc. 



Branchiform. Shaped like gills. 



Branchiostegal spine. Spine on carapace in region of gills, as in shrimps, 

 prawns, etc. 



Bristle. Stiff hair. 



Brood-pouch. Capsule formed on back or on certain appendages, and con- 

 taining ova, as in many entomostraca. 



Buccal area. Region of the mouth. 



Buccal cavern. Said of the mouth region when deep or cavernous, as in 

 crabs. 



Buccal mass. The mouth, with its various appendages, as the lips, mandibles, 

 maxillse, maxillipeds, etc. 



Bulbous. Bulb-like or swollen. 



Ccccum. Blind sac. 



Calcareous. Partaking of lime. 



Cancellated. Cross-barred, like network. 



Capitulum. Top of a column, as the upper part of a stalked barnacle. 



Carapace. Shell or hard covering of back. 



Carina. Keel ; especially median dorsal calcareous plate of the carapace in 



certain barnacles. 

 Carinate. Keeled. 



Carpopodite. Appendage to carpus, as that in certain macrurans. 

 Carpus. Wrist. 

 Caudal fan. Tail fan, as flattened lobes formed by telson and uropoda in the 



macrurans. 

 Caudal styles. Pillars of the tail, as the long processes of anal segment seen 



in phyllopods and copepods. 

 Caudal sivinimerets. Leaf-like lateral lobes of caudal fan or telson. 

 Centrolecithal. Said of eggs which have an accumulation of yolk in the 



center surrounded by a superficial layer of protoplasm. 

 Ccphalon. Head, or anterior portion of front division of body. 

 Cephalosome. Head as a segment. 

 Cephalofhorax. vSo called when thoracic segments may be fused in greater 



or lesser number to form an anterior division of body. 

 Cervical groove. Line dividing front division of body into a cephalothorax 



and thorax, as in crawfishes. 



