GLOSSARY. 917 



Crustacea animals having an external crust or skeleton, as the Crab. 



Cryptogamia plants with concealed fructification, as Mosses, Ferns, &c. 



Crystalline presenting the structure of crystals. 



Crystals symmetrical forms assumed by mineral substances. 



Cupreous coppery. 



Cyathiform cup-shaped. 



Cycade-s: plants allied to the palms and ferns. 



Debris the ruins or detritus of rocks and strata. 



Deciduous parts which are shed, as leaves of trees. 



Delta alluvial deposits formed by rivers. 



Dendritic branched like a tree 



Denudation the removal of strata by the action of water, so as to expose 



the rocks beneath, as in the Wealden of the S.E. of England . 



Dermal belonging to the skin. 



Desiccation the act of drying. 



Detritus disintegrated materials of rocks. 



Dicotyledonous plants with seeds having two lobes. 



Didelphis a marsupial animal, allied to the opossum. 



Diluvium a term formerly employed to designate ancient alluvial 



deposits. 



Dip the inclination of strata. 



Diptera insects having two wings. 



Discoidal in the form of a disk. 



Dike an intrusion of melted matter into rents or fissures of rocks. 



Dolomite crystalline magnesian limestone. 



Druses minute crystals lining the cavities of minerals ; as, for example, 



quartz in the hollows of flint nodules. 



Earth's Crust ., that portion of the solid surface of the earth which is 



accessible to human observation. 



Echinoderms animals having a prickly external integument, as the Star- 

 fish, Sea-Urchin, &c. 



Echinus sea-urchin. 



Edentulous toothless; animals having no front teeth, as the Armadillo. 



Elytra wing-cases of insects. 



Encrinite a genus of lily-shaped animals. 



Entomostraca shelled crustaceans, as the Cyprides. 



Eocene the dawn of the present epoch ; the early tertiary strata. 



Ephemeron the creature of a day. 



Eroded worn away. 



Escarpment the steepest side of a hill or mountain-chain. 



Exuvi;e fossil remains of animals. 



Fault interruption of the continuity of strata with displacement. 



Falun a French term for tertiary strata analogous to the Crag. 



Fauna the zoology of a particular country. 



Felspar a mineral which enters into the composition of many primary 



rocks. 



Felspathic belonging to, or composed of felspar. 



Ferruginous impregnated with iron. 



Flora the botany of a particular country. 



Foliaceous ,. arranged like leaves. 



Foraminifera a division of animalcules having perforated shells. 



Formation a group, or series of strata, supposed to have been formed 



during one geological epoch. 



Fossiliferous strata containing fossils. 



Fusiform spindle-shaped. 



Gasteropoda mollusks with the locomotive organs on the underpart of 



the body, as the Snail. 



Gelatinous jelly-like. 



Globose .. ; globe-like. 



Gorgonia a genus of flexible arborescent corals. 



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