Calcareous, relating to lime, of a limy nature.
Callosity, a protuberance.
Callus, is composed of two short ribs, united at the base, and
converging at the apex towards the hinder part of the shell.
Campanulate, bell-shaped.
Canaliculated, made like a pipe or gutter.
Cancellated, longitudinally and transversely ribbed.
Carinate, having a longitudinal prominence like the keel of a vessel.
Carinated, keeled.
Cartilage, a flexible fibrous substance by which the valves are
united, situated near the beak.
Cauda, the elongated base of the venter, lip, and columella.
Cicatrix, the glossy impression in the inside of the valves, to which
the muscles of the animal are affixed.
Ciliate, edged with parallel hairs, bristles, or appendages, like the
eyelids.
Cinereous, of ash colour, of the colour of wood ashes.
Clavate, club-shaped, thicker towards the top, elongated towards the
base.
Cochleæ, shells of one piece, univalves.
Cochleate, twisted like a screw or the shell of a snail.
Columella, the upright pillar in the centre of most of the univalve
shells.
Commissure, a joint or seam.
Complicated, doubled together.
Compressed, perpendicularly squeezed together, in opposition to
depressed, which is horizontally flattened.
Concamerated, arched over, vaulted.
Concamerations, divided into compartments, as in the Nautili.
Concave, hollowed out like a bowl.
Concentric, running to a centre.
Conchæ, shells consisting of two or more pieces or valves, bivalves,
or multivalves.
Cone, the form of a sugar-loaf.
Confluent, running together.
Conoid, a figure like a cone, sugar-loaf-shaped.
Contorted, twisted, or incumbent on each other, in an oblique
direction.
Contracted, shortened, shrunk up.
Convoluted, rolled upon itself, twisted spirally, like a piece of
paper rolled between the finger and thumb.
Cordate, heart-shaped.
Cordiform, resembling the form of a heart.
Coriaceous, of a leather-like consistence.
Corneous, of a horn colour, resembling a horn.
Coronal, relating to the crown or top.
Coronated, crowned, or girt towards the apex.
Costated, ribbed, having large ribs.
Corpus, the body of the shell, the last or great wreath in which the
aperture is situated.
Cortex, the anterior skin or epidermis.
Crenulated, notched at the margin, scalloped.
Crispated, rough with waving lines.
Cuneiform, shaped like a wedge.
Cylindrical, round like a cylinder or a roller.
Cymbiform, boat-shaped.