158 



CONCHOLOGY. 



Cartilage, a flexible fibrous sub- 

 stance by which the valves 

 are united. 



Cartilaginous, resembling a liga- 

 ment. 



Chambered, divided by parti- 

 tions. 



Cicatrix, the muscular impres- 

 sion. 



Ciliated, edged with bristles or 

 hairs. 



Cincrous, of an ash colour. 



Clavate, club-shaped. 



Columella, the upright pillar of 

 the shell. 



Complicated, doubled together. 



Compressed, flattened. 



Concave, hollowed out. 



Concentric, running to the cen- 

 tre. 



Cone, the form of a sugar loaf. 



Convolute, whorls running 

 round. 



Confluent, running together. 



Conoid, figure like a cone. 



Contorted, twisted in oblique 

 direction. 



Contracted, shortened, shrunk 

 up. 



Cordate, heart shape. 



Cordiform, form of a heart. 



Coriaceous, leather-like consist- 

 ence. 



Corneus, resembling horn. 



Coronal, resembling a crown. 



Coronated, crowned towards the 

 apex. 



Costated, ribbed. 



Cortex, anterior skin. 



Crenulated, notched at the mar- 

 gin- 



Grispated, with waving lines. 



Cuneform, wedge form. 



Cylindrical, round like a roller. 



Cybiform, boat-shaped. 



D. 



Decollated, truncated trans- 

 versely. 



Decorticated, divested of epi- 

 dermis. 



Decussated, lines intersecting 

 each other. 



Deflexed, bent aside. 



Dentated, having teeth. 



Depressed, shallow, flat. 



Diaphanous, clear, pellucid. 



Digitated, having finger-like 

 claws. 



Disk, the highest part of the 

 valves. 



Divaricated, spreading out. 



Divergent, tending to a point. 



Dorsal, belonging to the back. 



Dotted, punctured like a thim- 

 ble. 



Duplicated, divided into plaits 

 or folds. 



E. 



Ears, projections on the sides 



of the hinge. 

 Echinated, set with spires. 

 Effuse, spread out. 

 Elliptical, oval. 

 Elongated, drawn out. 

 Emarginated, with the edge 



notched. 

 Ensisform, sabre-shaped. 

 Entire, whole. 

 Epidermis, the outer coating of 



a shell. 

 Equilateral, all sides alike. 

 E qui valve, both sides alike. 

 Exserted, protruding. 



Falcated, hooped like a scythe. 

 Fasciated, covered with bands. 

 Ferruginous, of an iron colour. 

 Filament, a thread-like process. 



