384 GLOSSARY. 



CRiNOrDEA (Gr. krinon, a lily ; eidos, form). An order of Echinodermata, 



comprising forms Avhich are usually stalked, and sometimes resemble lilies 



in shape. 

 Crioceras (Gr. krios, a ram ; keras, a horn). A genus of Ammonitidce. 

 Crocodilia (Gr. krokodeilos, a crocodile). An order of Eeptiles. 

 Crossoptertgid^ (Gr. krossotos, a fringe ; x>ierux, a fin). A sub-order of 



Ganoids in which the paired fins possess a central lobe. 

 Crustacea (Lat. criista, a crust). A class of Articulate animals, comprising 



Crabs, Lobsters, kc, characterised by the possession of a hard shell or 



crust, which they cast periodically. 

 Cryptogams (Gr. knqjtos, concealed ; gamos, marriage). A division of plants 



in which the organs of reproduction are obscure and there are no true 



flowers. 

 Ctenacaxthus (Gr. kteis, a comb ; akuntlui, a thorn). A genus of fossil fishes, 



named from its fin-spines. 

 Ctenoid (Gr. kteis, a comb ; eidos, form). Applied to those scales of fishes 



the hinder margins of which are fringed with spines or comb-like projections. 

 CuRSORES (Lat. curro, I run). An order of Aves, comprising birds destitute 



of the power of flight, but formed for running vigorously {e.g., the Ostrich 



and Emeu). 

 Cuspidate. Furnished -^dth small pointed eminences or " cusps." 

 Cyathocrixus (Gr. kuxiAhos, a cup ; krinrm, a lily). A genus of Crinoids. 

 Cyathophyllum (Gr. kuathos, a cup ; i:)h\dlon, a leaf). A genus of Rugose 



Corals. 

 Cycloid (Gr. kukios, a circle ; eid.os, form). Applied to those scales of fishes 



which have a regularly circular or elliptical outline ■v\ith an even margin. 

 Cyclophthalmus (Gr. kuklos, a circle ; ojMhalmos, eye), A genus of fossil 



Scorpions. 

 Cyclostomi (Gr. kuklos, and stor/uc, month). Sometimes used to designate the 



Hag-fishes and Lampreys, forming the order Marsipohranchii. 

 Cypr^a (a name of Venus). The genus of Univalve Molluscs comprising the 



Cowries. 

 Cyrtoceras (Gr. kurtos, crooked ; keras, horn), A genus of Tetrabranchiate 



Cephalopods. 

 Cystiphyllum (Gr, kustis, a bladder ; phullon, a leaf). A genus of Rugose 



Corals. 

 Cystoidea (Gr. kustis, a bladder; eidos, form). The '' Globe-crinoids," an 



extinct order of Echinodennata. 



Dadoxylon (Gr. dadion, a torch ; xulon, wood). An extinct genus of Con- 

 iferous trees. 



Decapoda (Gr. deka, ten ; jpodes, feet). The division of Cmstacea which have 

 ten feet ; also the family of Cuttle-fishes, in which there are ten arms or 

 cephalic processes. 



Deciduous (Lat. decido, I fall ofi). Applied to parts which fall off" or are shed 

 during the life of the animal. 



Deixosauria (Gr. deinos, terrible ; saura, lizard). An extinct order of Rep- 

 tiles. 



Deinotherium (Gr. deinos, terrible; therion, beast). An extinct genus of 

 Proboscidean Mammals. 



Dendrograptus (Gr, dendron, tree ; grapho, I write), A genus of Grapto- 

 lites, 



Desmidle, Minute fresh- water plants, of a green colour, without a siliceous 

 epidermis. 



D1ATOMACE.E (Gr. diatemno, I sever). An order of minute plants which are 

 provided with siUceous envelopes, 



Debranchiata (Gr, dis, twice ; hragchia, gill). The order of Cephalopoda 

 (comprising the Cuttle-fishes, &c.) in which only two gills are present, 



DiCERAS (Gr, dis, twice ; keras, horn). An extinct genus of Bivalve Molluscs, 



Dictyonema (Gr. diktuon, a net ; ne'ino., thread). An extinct genus of Poly- 

 «oa(?). 



