384 GLOSSARY. 
CRINOIDEA (Gr. krinon, a lily; eidos, form). An order of Echinodermata, 
Se a forms which are usually stalked, and sometimes resemble lilies 
in shape. 
CRIOCERAS (Gr. krios, aram; keras,a horn). A genus of Ammonitide. 
CROCODILIA (Gr. krokodeilos, a crocodile). An order of Reptiles. 
CROSSOPTERYGID (Gr. krossotos, a fringe; plerux, a fin). A sub-order of 
Ganoids in which the paired fins possess a central lobe. 
CRUSTACEA (Lat. crusta, a crust). A class of Articulate animals, comprising 
Crabs, Lobsters, &c., characterised 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 reproduction are obscure and there are no true 
flowers. 
CTENACANTHUS (Gr. kteis,a comb; akantha, 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. curvo, Irun). 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 with small pointed eminences or “‘ cusps.” 
CYATHOCRINUS (Gr. kuathos, a cup; krinon, a lily). A genus of Crinoids. 
Cree ne (Gr. kuathos, a cup; phullon, a leaf). A genus of Rugose 
orals. 
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. 
CYCLOPHTHALMUS (Gr. kuklos, a circle ; ophthalmos, eye). A genus of fossil 
Scorpions. 
CycLostomi (Gr. kuklos, and stoma, mouth). Sometimes used to designate the 
Hag-fishes and Lampreys, forming the order Marsipobranchii. 
CypR#HA (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 Echinodermata. 
DADOXYLON (Gr. dadion, a torch; xulon, wood). An extinct genus of Con- 
iferous trees. 
Decapopa (Gr. deka, ten ; podes, feet). The division of Crustacea which have 
ten feet; also the family of Cuttle-fishes, in which there are ten arms or 
cephalic processes. 
DeEciDuows (Lat. decido, I fall off). Applied to parts which fall off or are shed 
during the life of the animal. 
DEINOSAURIA (Gr. deinos, terrible ; saura, lizard). An extinct order of Rep- 
tiles. 
DEINOTHERIUM (Gr. deinos, terrible; thérion, beast). An extinct genus of 
Proboscidean Mammals. 
DENDROGRAPTUS (Gr. dendron, tree; grapho, I write). A genus of Grapto- 
lites. 
DesMIDIz. Minute fresh-water plants, of a green colour, without a siliceous 
epidermis. 
DIATOMACEH (Gr. diatemno, I sever). An order of minute plants which are 
provided with siliceous envelopes. 
DIBRANCHIATA (Gr. dis, twice ; bragchia, 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. 
eet (Gr. diktuon, a net; nema, thread). An extinct genus of Poly- 
200 (*). 
