USED IN NATURAL HISTORY. 



47 



said to be crenelled, when its mar- 

 gins have rounded teeth. 



CREWA'TUM. Lat. Crenate; hav- 

 ing rounded teeth. 



CRE'NULATE. Finely crenate. 



CKEXULA'TION. A rounded tooth, 

 or notch. 



CREPI'DULA. Lat. A slipper. A 

 genus of mol lusks. (p. 58, Book v). 



CREPI'IKJLJE. Lat. p In r. of crepidula- 



CREPITANS. Lat. Cackling, ring- 

 ing; making a noise; rattling, 

 chattering. 



CREPUS'CULAR. fr. lat. crepuscula, 

 twilight. Relating to twilight. 



CHESTED; Having an appearance 

 like a cock's comb. 



CRETA'CEOUS. fr. lat. creta, chalk. 

 Of the nature of chalk; relating 

 to chalk. The cretaceous system is 

 a geological series of rocks in 

 which calcareous matter predo- 

 minates, the flints arid other ex- 

 traneous minerals being subordi- 

 nate. It is a marine deposit. 



CREX. fr. gr. krex, a bird ; the rail. 



CRIB'KIFOIIM. ) Full of holes like a 



CRIB'ROSK. sieve. 



CRI'CETUS. Lat. The hamster. 



Cm'tfKS. Lat. Hairs. 



CRI'NITUS. Lat. Hairy. 



CRINOIUE.K. fr. gr. krinon, lily; ei- 

 t/os, resemblance. A family of 

 radiate animals. 



CIUOCE'RATITES. fr. gr.A;rios,aram ; 

 keras, a horn. A fossil cephalo- 

 pod. (p. (57, Book viii). 



CRI'SKS. Lat. plur. of crisis. 



CRI'SIS. Gr. The point of time 

 when any aflair comes to its 

 height. 



Cnisp. When leaves are very much 

 vndulated at the margin, they are 

 called crisp or curled. 



CRISP A'TKD Rough with waving 

 lines. 



CRISTA'TA. ) Lat. Tufted, combed, 



CRISTA'TUS. crested ; wearing a 

 crest. 



CRIS'TATE. Having a crest. 



CROCODI'LIAN. Any animal of the 

 tribe of crocodiles. 



CROCOPI'LIDA. fv.gr. krokodeilos, cro- 

 codile; eidos, resemblance. Sys- 

 tematic name of the family of 

 crocodiles. 



CROCODI'LUS. Lat. A crocodile. 

 According to some, fr. gr. krokos, 

 saffron; deilos, fearful, timid, be- 

 cause the land crocodile is afraid 

 of the sight and odour of saffron : 

 according to others, from kroke, 

 shore, and deilos, timid ; because 

 the water-crocodiles fear the shore, 

 where men set snares for them. 



CROP, or CRAW. A sort of prelimi- 

 nary stomach: in some birds, 

 formed by an expansion of the 

 oesophagus. 



CROP OCT. When a rock, in place, 

 emerges on the surface of the 

 earth, it is said to crop out. 



CRO'TALUS. fr. gr. krotaho, I make 

 a noise. A Rattlesnake. 



CRU'CIATE. Cross-like. 



CRUCI'FER.E. fr. lat. crwx, crucis, a 

 cross; fero, I bear. A family of 

 plants which have flowers in form 

 of a Maltese cross. 



CRU'CIFORM. Cross-shaped. Con- 

 sisting of four petals placed like 

 a cross. 



CRU'STA. The brittle, crustaceous 

 thallus of lichens; the bony co- 

 vering of the crab, lobster, &c. 



CRUSTA'CEA. fr. lat. crusta, a hard 

 covering. A class of free articu- 

 late animals, with articulated 

 limbs, a branchial respiration and 

 a dorsal or ventrical heart. 



CRUSTA'CEJE. Lat. plur. Crusta'- 

 ceans. 



CRUSTA'CEAN. Any animal of the 

 class of crusta'cea; a crab. 



CHUSTA'CEOUS. Of the nature, or 

 belonging to crustaceans. 



CRT'OLITE. fr. gr. kruos, frost; li- 

 thos, a stone. A very fusible mi- 

 neral which consists of the double 

 hydrofluate of alumina and soda, 

 occurring in gneiss. 



CHT'PTA. fr. gr. kruptos, concealed. 

 A term applied to the vesicular 

 receptacles of oil found in the 



