Glossary. 
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Coprolites (Gr. kopros, dung ; lithos, a stone). Properly 
applied to the fossilised excrements of animals ; but 
often employed to designate £>hosphatic concretions 
which are not of this nature. 
Cretaceous (Lat. creta, chalk). The group of rocks which 
in Europe contains white chalk as one of its most con- 
spicuous members. Chalk is not known to occur in 
Australian cretaceous rocks. 
Crustacea (Lat. crusta, a crust). A class of Articulate 
animals, comprising Crabs, Lobsters, &c., character- 
ised 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 reproduc- 
tion are obscure. They have no true flowers. 
Ctenoid (Gr. kteis , gen. ktenos , a comb ; eidos, form). 
Applied to those scales of fishes, the hinder margins 
of which are fringed with spines or comb-like pro- 
jections. 
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. 
Deinosauria (Gr. deinos , terrible; a lizard). An 
extinct order of reptiles. 
Denudation (Lat. denudo, I lay bare). Wbarin°* down 
of rocks. 
Diatomaceae (Gr. diatemno , I sever.) An order of minute 
plants which form siliceous envelopes. 
Diorite. A rock of igneous origin, and made up of two 
minerals, namely, a triclinic felspar and hornblende, 
felted together without a “ paste.’’ Accessory minerals 
are often present, such as quartz or mica. Quartz 
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