GLOSSARY 



OF 



TERMS USED IX COyCHOLOGY. 



Acuminated^ terminated in a sharp point. 



Anterior, (in Univalves ~' the part which forms the spire: 

 (in Bivalves), see Margin. 



Aperture, the orifice or opening of the shell; it is called 

 angular, when its circumference has several angles: 

 bimarginated, when the right lip forms a double mar- 

 gin: coarcfrtfe, contracted : (?omp>e5.?e^, flattened : gap- 

 ing, when one of the extremities is wider than the 

 other: linear, when nanow, and the length greatly ex- 

 ceeds the breadth : transverse, when the breadth is great- 

 er than the length, (These terms are applied to Uni- 

 valves). 



Apex, the tip or small end of a shell. 



Articulated, (applied to Multivalves\ when the different 

 pieces of which the shell is composed are so strongly 

 united, that they appear to forai one shell : (when ap- 

 plied to Bivalves', see Teeth. 



Anriculated, having ears. 



Base, (applied to Multivalves), the part on which the 

 shell is supported : (to Uuivalves% the most elevated 

 part of the shell opposite to the spire. 



