GLOSSARY. 377 



CoNCHJFERs. (Lat. cc»?icAa, a shell ; /ero, I bear.) Shell-fish; usually restricted 



to those with bivalve shells. 

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



jointed legs, as insects, crabs, and spiders. 

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

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

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



the eve. 

 Corneous. Horny. 

 CoRNEULE. 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. \i\y ; eidos,]ike.) Belonging to the Echinoderma which 



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

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

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



skin or crust, which they cast periodically. 

 Cryptobranchiate. (Gr. kruptos, hidden; bragcliia, g\\\s.) Those molluscous and 



articulate animals, which have no conspicuous gills. 

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



plants in which the organs of generation are concealed. 

 Cyclobranchiata. (Gr. kuklns, round ; hragchia, gills.) The molluscous animals 



which have the gills disposed in a circle. 



Dec APOD A. (Gr. deca, ten; pons, afoot.) 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, 

 Dejiodex. ( 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. 

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



having two gills. 

 Diccelous. (Gr. dis ; koilos, a cavity.) A heart with two cavities. 

 Didactyle. (Gr. dis ; and dacttdos, a finger.) A limb terminated by two fingers. 

 Digitate. (Lat. digitus, a finger.) When a part supports processes like fingers. 

 Dimidiate. (Lat. dimidium, hsdi.) Divided into two halves. 

 Dioecious. (Gr. dis, twice, and oikos, a house,) The species which consist of male 



and female individuals. 

 DiMYARY. (Gr. dis ; wmow, a muscle.) A bivalve whose shell is closed by two 



muscles, 

 DiPTERA. (Gr. dis ; pteron, a wing.) The insects which have two wings. 

 Discoid, (hat. discus, a quoit.) Quoit-shaped. 



DisTOMA. (Gr. dis ; stoma, mouth.) The intestinal worms with two pores. 

 Diverticulum. (From the Latin for a bye-road.) Applied to a blind tube 



branching out from the course of a longer one. 

 Dorsad. (Lat. dorsum, the back.) Towards the back. 

 Dorsibranchiate. (Lat. dorsum; and branchia, gills.) The Mollusca with gills 



attached to the back. 

 DoKSO-iNTESTiNAL. A part which is on the dorsal aspect of the intestine. 

 Ductus. A duct or tube which conveys away the secretion of a gland. 

 Duodenum. The first portion of the small intestine, which, in the human subject, 



equals the breadth of twelve fingers. 



Ecdvsis. (From the Greek, signifying the act of stripping.) Moulting of the 

 skin. 



