186 GLOSS AEY. 



Bivalve When a shell consists of two parts, closing 

 like a double door. The mollusca so protected 

 are commonly called bivalves, as the Mussel. 



Brachyura (Gr. brachus, short ; oura, tail) The tribe 

 of Crustacea with short tails, as the Crabs. 



Byssus (from the Greek word signifying the silky fila- 

 ments which project from the bivalve called Pinna) 

 Applied to the analogous parts in other molluscs. 



Carapace The upper shell of the Crab or Tortoise. 



Carnivorous (Lat. caro, flesh; voro, I devour) The 

 animals which feed on flesh. 



Cephalopoda (Gr. Jcephali; poda, feet) The class of 

 molluscous animals in which long prehensile pro- 

 cesses or feet project from the head. 



Cilia (Lat. cilium, an eyelash) The microscopic hair- 

 like bodies which cause, by their vibratile action, 

 currents in the contiguous fluid, or a motion of the 

 body to which they are attached. 



Cirri (Lat. cirrus, a curl) The curled filamentary ap- 

 pendages, as at the feet of the Barnacles. 



Cirripeds, or Cirripedia (Lat. cirrus, a curl ; pes, a foot) 

 A class of articulate animals having curled joint- 

 ed feet ; sometimes written Cirrhipedia and Cirr- 

 hopoda. 



Conchifera (Lat. concha, a shell; fero, I bear) Shell- 

 fish ; usually restricted to those with bivalve shells. 



Coriaceous (Lat. corium, hide) When the part has the 

 texture of a tough skin. 



Cornea (Lat. corneus, horny) The transparent horny 

 membrane in front of the eye. 



Crustacea (Lat. crusta, a crust) The class of articulate 

 animals with a hard skin or crust, which they cast 

 periodically. 



