X GLOSSARY. 



BeaJii Beaked, having the extremity of the base of the 

 shell elongated and contracted in the form of a beak. 



Bearded, when the cjiidermis is of a bristly or hairy na^ 

 ture, {see plate yi-ff/- 3.) 



Bj/ssuSy a hair-like substance formed by some of tlie ani- 

 mals of Bivalves, by which they attach themselves to 

 extraneous bodies, [seeplate w-fg- !•) 



Canal, the prolongation of the mouth in a kind of groove 

 or gutter, as in the Murcx and Strombus. 



Canaliculated, channelled or grooved. 



Cardinal, see Teeth. 



Carinated, having the form of the keel of a boat. 



Cartilage, see Ligament. 



Chambered, when the shell is internally divided by par- 

 titions, parallel to the mouth. 



Ciliated, surrounded with parallel filaments. 



Clttvate, club-shaped. 



Columella, is that part of the shell round which tlie 

 whorls turn. 



Compressed, (in Bivalves), when the valves are nearly 

 flat, flattened. 



CoHcamcrated, see Chambered. 



Convolute, when the whorls turn round a lengthened 

 cone, nearly vertical to each other. 



Cordiform, heart-shaped. 



Coronated, having the apex surrounded with a row of 

 spines. 



Crcnated, having blunt teeth. 



Decollated, Iiaving the spire or upper part of the shell 



truncated transversely. 

 Decussated, striated transversely. 



