GLOSSARY 



OF TERMS USED IN CONCHOLOGY. 



A. 



Abbreviated, cut short. 



Abdomen, the belly. 



Acuminated, sharp pointed. 



Aculeated, prickly. 



Alated, winged. 



Annulated, divided into rings. 



Annulations, rings. 



Aperture, the orifice or opening 

 of the shell. 



Apex, the point of the spire. 



Approximating, approaching to- 

 gether. 



Arcuated, of an arch form. 



Area, surface betw^een the lines. 



Articulations, junctures or 

 joints. 



Attenuated, thin, slender. 



Aurated, having ears, as the 

 Pecten. 



Auricled, having ear-like appen- 

 dages. 



Auriform, ear shaped. 



B. 



Barbed, bearded. 



Base, lower extremity of the 



shell. 

 Beak, prolongation at the base, i 



Beard, see Byssus, 



Bi, signifying two, 



Biangulated, having two corners 

 or angles. 



Bidentate, having two teeth. 



Bifid, opening with a cleft, 



Bilobate, divided into two lobes. 



Bimarginate, two margins or 

 lips. 



Biradiate, having two rays. 



Bivalve, having two valves. 



Blunt, obtuse, opposed to acute. 



Borer, a piercer. 



Bulging, gibbous, swollen out. 



Byssus, common in the Mytilus 

 and Pinna, by which they 

 attach themselves to ob- 

 jects. 



C. 



Callous, indurated. 

 Callosity, a protuberance. 

 Calcareous, relating to lime. 

 Canal, the prolongation of the 



beak. 

 Canaliculated, channelled or 



grooved. 

 Cardinal, see Teeth. 

 Carinated, like a boat's keel. 



