Producing a corallum.


The corallum secreted by an Actinozoon which consists of a single polype; or the portion of a composite corallum which belongs to, and is secreted by, an individual polype.


(from the Latin for red coral). The hard structures deposited in, or by, the tissues of an Actinozoon - commonly called a "coral.


(Lat. corium, hide). Leathery.

Corpus callosum

(Lat. the " firm body "). The great band of nervous matter which unites the two hemispheres of the cerebrum in the Mammals.


(Lat. corpusculum, a little body or particle). Applied to fluids which, like the blood, contain floating solid particles or "corpuscles."

Cortical layer

The layer of consistent sarcode, which in the Infusoria encloses the chyme mass, and is surrounded by the cuticle. Sometimes called the "parenchyma of the body."


(Lat. costa, a rib). Applied amongst the Crinoidea to designate the rows of plates which succeed the inferior or basal portion of the cup (pelvis). Amongst the Corals the "costae" are vertical ridges which occur on the outer surface of the theca, and mark the position of the septa within.


(Lat. costa, a rib). Connected with the ribs.


(Gr. kranion, the skull). The bony or cartilaginous case in which the brain is contained.


(Gr. kraspedon, a margin or fringe). The long, convoluted cords, containing thread - cells, which are attached to the free margins of the mesenteries of a Sea-anemone.


(Lat. crepusculum, dusk). Applied to animals which are active in the dusk or twilight.


(Gr. krinos, a lily; eidos, form). An order of Echinodermata comprising forms which are usually stalked, and sometimes resemble lilies in shape.


(Gr. krokodeilos, a crocodile). An order of Reptiles.


A partial dilatation of the gullet, technically called "ingluvies."


(Lat. crusta, a crust). A class of articulate animals, comprising Crabs, Lobsters, etc, characterised by the possession of a hard shell or crust, which they cast periodically.


(Gr. kteis, a comb; kustis, a bag or cyst). The sense-organ (probably auditory) which occurs in the Ctenophora.


(Gr. kteis, a comb; eidos, form). Applied to those scales of fishes, the hinder margins of which are fringed with spines or comb-like projections.


(Gr. kteis, a comb ; and phero, I carry). An order of Actinozoa, comprising oceanic creatures, with swim by means of "ctenophores," or bands of cilia arranged in comb-like plates.


(Lat. curro, I run). An order of Aves, comprising birds destitute of the power of flight, but formed for running vigorously (e.g., the Ostrich and Emeu).