GLOSSARY. 483 



CiERiPEDiA, CiRRHiPEDiA or CiRRHOPODA (Lat. cimis, a ciu'l ; and pes, a 

 foot). A sub-class of Crustacea with curled jointed feet. 



Cladocera (Gr. M.ados, a branch ; Tceras, a horn). An order of Crustacea with 

 branched antennse. 



Clavate (Lat. clavus, a club). Club-shaped. 



Clavicle (Lat. clavicula, a little key). The "collar-bone," forming one of 

 the elements of the pectoral arch of Vertebrates. 



Cloaca (Lat. a sink). The cavity into which the intestinal canal and the 

 ducts of the generative and urinary organs open in common, in some In- 

 vertebrates {e.g., iu Insects), and also in many Vertebrate animals. 



Clypeifoem (Lat. clypeus, a shield; and /orma, shape). Shield-shaped; ap- 

 plied, for example, to the carapace of the King-crab. 



CoccosTEUS (Gr. kol-kos, berry; osteon, bone). A genus of Ganoid Fishes. 



CocHLiODus (Gr. Icochlion, a snail-shell; oclous, tooth). A genus of Cestra- 

 ciont Fishes. 



Ccelenteeata (Gr. koilos, hollow; enteron, the bowel). The sub-kingdom 

 which comprises the Hydrozoa and Actinozoa. Proposed by Frey and 

 Leuckhart in place of the old term Radiata, which included other animals 

 as well. 



Ccenenchyma (Gr. hoinos, common ; cnchuma, tissue, literally an infusion). 

 The common calcareous tissue which unites together the various corallites 

 of a compound corallum. 



CcENCECiUM (Gr. koinos, common; oikos, house.) The entire dermal system 

 of any Polyzoon: employed in place of the terms jjolyzoary or polypidom. 



CcENOSAEC (Gr. ^oi?ios, common; sara;, flesh). The common organised medium 

 by which the separate polypites of a compound Hydrozoon are connected 

 together. 



CoLEOPTERA (Gr. koUos, a sheath; pteron, wing). The order of Insects 

 (Beetles) in which the anterior pair of wings are hardened, and serve as 

 protective cases for the posterior pair of membranous wings. 



CoLiiBRiNA (Lat. coluber, a snake). A division of the Ophidia. 



CoLUMBACEi (Lat. columha, a dove). The division of Easorial birds com- 

 prising the Doves and Pigeons. 



Columella (Lat. dim. of cohcmna, a column). In Conchology, the central 

 axis round which the whorls of a spiral univalve are wound. Amongst the 

 Actinozoa, it is the central axis or pillar which is found in the centre of the 

 thecEe of many corals. 



Column. Applied to the cylindrical body of a Sea-anemone (Actinia) ; also 

 to the jointed stem or peduncle of the stalked Crinoids. 



Conchifera (Lat. concha, a shell ; fero, I carry). Shell-fish. Applied in a . 

 restricted sense to the bivalve Molluscs, and used as a synonym for Lamelli- 

 hranchiata. 



Condyle (Gr. kondulos, a knuckle). The surface by which one bone articulates 

 with another, j^pplied especially to the articular surface or surfaces by 

 which the skull articulates with the vertebral column. 



Conirostres (Lat. conus, a cone ; rostrum, a beak). The division of Perching 

 P)irds with conical beaks. 



CoPEPODA (Gr. kope, an oar ; podes, feet). An order of Crustacea. 



CORACOID (Gr. korax, a crow ; eidos, form). One of the bones which enters into 

 the composition of the pectoral arch in the Vcrtclrata. In most Mammals 



