Callous, indurated.
Callosity, a protuberance.
Calcareous, relating to lime.
Canal, the prolongation of the beak.
Canaliculated, channeled or grooved.
Cardinal, see Teeth.
Carinated, like a boat’s keel.
Cartilage, a flexible fibrous substance by which the valves are united.
Cartilaginous, resembling a ligament.
Chambered, divided by partitions.