GLOSSARY. 671 



CiRRiGEROUs. Supporting cirri. 

 CiiiRiGRADES. Moving by cirri. 

 CiERiPEDS or CiRRiPEDiA, (Lat. cirrus, a curl ; pes, a foot.) A class of articulate 



animals having curled jointed feet. Sometimes written Cirrhipedia and Cirrho- 



poda. 

 Clavate. (Lat. clavus, a club.) Club-shaped ; linear at the base, but growing 



gradually thicker towards the end. 

 Cloaca. (Lat. cloaca, a sink.) The cavity common to the termination of the in- 

 testinal, urinary, and generative tubes. 

 Cltpeiform. (Lat. clypeus, a shield ; forma, shape.) Shield -shaped ; applied to 



the large prothorax in beetles. 

 Coarctate, (Lat. coarcto, I compress.) The pupa of an insect, which is enve- 

 loped by a case, which gives no indication of the parts it covers. 

 Coelelminth A. (Gr. ^oz7os, hollow ; hehnins, an intestinal worm.) The intestinal 



worms which are hollow, and contain an ahmentary tube in the cavity of the body. 

 CoLEOPTERA. (Gn koleos, a sheath ; pteron, a wing.) The order of insects in 



which the first part of wings serves as a sheath to defend the second pair. 

 Columella. (From the Latin for a small column.) Used in Conchology to signify 



the central pillar around which the spiral shell is wound. 

 CoioiissuRAL. (Lat. committo, I solder.) Belonging to a line or part by which 



other parts are connected together. 

 CoNCHiFERS. (Lat. concha, a shell ; fero, I bear.) Shell-fish ; usually restricted 



to those with bivalve shells. 

 CoNDYLOPODS. (Gr. kondulos, a joint ; pons, a foot.) The articulate animals with 



jointed legs, as insects, crabs, and spiders. 

 CoRiACEOcs. (Lat. corium, hide.) When a part has the texture of tough skin. 

 CoRNDA. (Lat. cornu, a horn.) Horns or horn-like processes. 

 Cornea. (Lat. corneus, horny.) The transparent horny membrane in front of 



the eye. 

 Corneous. Horny. 

 CoRNECLE. Diminutive of cornea ; applied to the minute transparent segments 



which defend the compound eyes of insects. 

 Cretaceous (Lat. creta, chalk.) Belonging to chalk. 

 Crinoid. (Gr. krinon, a lily ; eidos, like.) Belonging to the Echinoderma which 



resemble lilies ; the fossils called stone-lilies or encrinites are examples. 

 Crura. (Lat. cms, a leg.) The legs of an animal, or processes resembling legs. 

 Crustacea. (Lat. crusta, a crust.) The class of articulate animals with a hard 



skin or cmst, which they cast pei-iodically. 

 Crtptobranchiate. (Gr. kruptos, hidden ; bragchia, giUs.) Those molluscous 



and articulate animals, which have no conspicuous giUs. 

 Cryptogamic. (Gr. kruptos, concealed ; gamos, marriage.) The animals or plants 



in which the organs of generation are concealed. 

 Cyclobranchiata. (Gr. kuklos, round ; bragchia, gills.) The molluscous animals 



which have the gills disposed in a circle. 



Decapoda. (Gr. deca, ten ; pons, a foot.) The crustaceous and molluscous ani- 

 mals which have ten feet. 



Decollated. (Lat. decollo, to behead.) The univalve shells in which the apex or 

 head is worn off in the progress of growth. 



Deciduous. Parts which are shed, or do not last the lifetime of the animal. 



Dehiscence. (Lat. dehisco, to gape.) The splitting open of the bag containing 

 the eggs. 



Deflected. Bent down. 



Demodex. (Gr. demos, lard ; dex, a boring worm.) The worm-like parasite of 

 the human sebaceous follicles. 



Dendritic. (Gr. dendron, a tree.) Branched like a tree. 



Dermal. (Gr. derma, skin.) Belonging to the skin. 



Diagnosis. (Gr. diagignosco, I distinguish.) The scientific distinction of one ani- 

 mal or part from another, or the definition of its essential characters. 



Dibranchiata. (Gr. dis, twice; bragchia, gills.) The order of Cephalopods 

 having two gills. 



