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POPULAR CONCHOLOGY. 



Bifid. Cleft in two. 

 Bifurcated. Twice forked. 



Boss. The projecting point in each valve, near the hinge in Bivalves ; 



the commencement of the shell. 

 BranchicB. Gills, breathing organs. 



Byssus. A bunch of silk-like fibres, by which many species of 

 Bivalves are attached to other substances. 



Callosity. A thick mass of shelly matter. 



Canal. A groove or gutter observable in different parts of certain 

 spiral shells belonging to the Zoophaga, or carnivorous tribe. In 

 these the canal is either lengthened, as in Murex, short, as in 

 Harpa, or truncate, as in Buccinum: in the two latter it thus 

 gives place to a notch, but in all these instances, it is that part 

 fitted for the protrusion of the long cylindrical siphon possessed 

 by all these animals. 



Cancellated. When the surface is marked by striae or lines, which 

 cross each other at right angles. 



Capital. Belonging to the head. 



Cardinal Teeth, in Bivalves, are those placed immediately beneath the 

 bosses, and between the lateral teeth, where such exist, as in the 

 common cockle. 



Carinated. Ridged like the keel of a boat. 



Cartilaginous. Gristly, like a tendon. 



Chambered. Divided internally into compartments, as in the Nautilus. 



(Polythalamous.) 

 Cilia. Vibrating hairs. 

 Cirrhus. A curl. 



Columella (or Pillar). The internal support of most spiral shells, 

 round which the whorls convolute ; it is not present in Solarium, 

 Delphinula, &c. 



Concentric. Arranged in parallel curves or bands, having one 



common centre. 

 Connate. United together. 

 Conoidal. Resembling a cone. 



Convoluted. The whorls rolled regularly one over the other. 

 Cordate. Heart-shaped. 



Corneous. Resembling the colour or substance of horn ; the epidermis 

 of some, and the operculum of other spiral shells often present 

 this appearance. 



Coronated. Crowned towards the apex, by a row of spines. 



