Cie s 8 AR. Y 
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 between the lines. 
Articulations, junctures or 
joints. 
Attenuated, thin, slender. 
Aurated, having ears, as the 
Pecten. 
Auricled, having ear-like appen- 
dages. 
Auriform, ear-shaped. 
iB: 
Barbed, bearded. 
Base, lower extremity of the 
shell. 
Beak, prolongation at the base. 
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 tu ob- 
jects. 
C. 
Callous, indurated. 
Callosity, a protuberance. 
Calcareous, relating to lime. 
Canal, the prolongation of the 
beak. 
Canaliculated, 
grooved. 
Cardinal, see Teeth. 
Carinated, like a boat’s keel. 
channeled or 
14 
