484 GLOSSARY. 



it is a mere process of the scapula, having, in Man, some resemblance iu 



shape to the beak of a crow. 

 CoKALLiGENOUS. Producing a corallum. 

 CoRALLiTE. 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. 

 Corallum (from the Latin for Red Coral). The hard structures deposited in, 



or by, the tissues of an Actinozooii — commonly called a "coral." 

 Coriaceous (Lat. corium, hide). Leathery. 

 CoRYNiDA (Gr. korune, a club). A group of the Hydroid Zoophytes, so called 



from their sometimes possessing clubbed tentacles. 

 CosT.E (Lat. costa, a rib). Applied amongst the Crinoidca to designate the 



rows of plates which succeed the inferior or basal portion of the cup (pelvis). 



Amongst the Coruls the "costfe" are vertical ridges which occur on the 



outer surface of the theca, and mark the position of the septa within. 

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

 Cranium (Gr. kranion, the skull). The bony or cartilaginous case in which 



the brain is contained. 

 Crinoidea (Gr. krinon, a lily ; eidos, form). An order of EcJdnodermata, com- 

 prising forms which are usually stalked, and sometimes resemble lilies in 



shape. 

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

 Crossopterygid^ (Gr. krossos, a fringe; pterux, a fin). A sub -order of 



Ganoids in which the paired fins possess a central lobe. 

 Crustacea (Lat. crusta, a crust). A class of Articulate animals, comprising 



Crabs, Lobsters, &c., characterised by the possession of a hard shell or crust, 



which they cast periodically. 

 Cryptogams (Gr. kruptos, concealed ; gamos, marriage). A division of plants 



in which the organs of reproduction are obscure and there are no true 



flowers. 

 Ctenoid (Gr. kteis, a comb ; cidos, form). Applied to those scales of fishes, 



the hinder margins of which are fringed with spines or comb-like pro- 

 jections. 

 Ctenophora (Gr. kteis, a comb ; and pJiero, I carry). An order of Actinozoa, 



comprising oceanic creatures, which swim by means of "ctenophores," or 



bands of cilia arranged in comb-like plates. 

 Cursores (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). 

 Cuspidate. Furnished with small pointed eminences or "cusps." 

 Cuticle (Lat. cuticula, dim. of cutis, skin). The pellicle which forms the 



outer layer of the body amongst the Infusoria. The outer layer of the in- 

 tegument generally. 

 Cycloid (Gr. kuklos, a circle ; eidos, form). Applied to those scales of fishes 



which have a regularly circular or elliptical outline with an even margin. 

 Cyclostomi (Gr, kuklos; and stoma, mouth). Sometimes used to designate 



the Hag-fishes and Lampreys, forming the order Mars-ipobranchii. 

 Cyst (Gr. kustis, a bladder or bag). A sac or vesicle. 

 Cystoidea (Gr. kustis, a bladder ; and eidos, form). An extinct order of 



EcMnodermata. 



