Byssus (Gr. byssos, fine flax). A term applied to the silken filaments or 'beard' of the Mussel and Pinna.
Carapace. The upper shell of the Crab, &c.
Calcareous. Composed more or less of lime.
Carnivorous (L. caro, flesh; voro, I devour). The animals which feed on flesh.
Caudal (L. cauda, the tail). Belonging to the tail.
Cephalópoda (Gr. kephale, a head; pous, a foot). The class of Molluscous animals in which long prehensile processes, or feet, project from the head, as in the Cuttle-fish.
Ciliogrades (L. cilium, an eyelash; gradior, I walk). The order of the acalephæ (as the Beröe) which swims by action of cilia.
Cilia (L. cilium, an eyelash). The microscopic hair-like bodies which cause, by their vibratile action, currents in the contiguous fluid, or a motion of the body to which they are attached.
Cirri (L. cirrus, a curl). The curled filamentary appendages, as at the feet of the Barnacles.