CRY 



[119] 



cue 



segments of spheres of unequal 

 size. 



CRYSTALIZA'TION. ] (crystallisation, 



CRYSTALLIZATION. ) Fr. cristalli- 

 sazione, It.) A methodical ar- 

 rangement of the particles of 

 matter according to fixed laws ; 

 congelation into crystals. 



CRYSTALLIZED QUARTZ. See Quartz. 



CTENA'CANTHUS. A genus of ichthyo- 

 lites of the old red sandstone, two 

 species of which have been de- 

 scribed by Agassiz; C. Ornatus, 

 and C. Serrulatus. 



CTEN'ODUS. A genus of ichthyolites 

 of the old red sandstone ; Aggassiz 

 enumerates six species. 



CTENOI'DEAN. Belonging to the third 

 order of fishes, according to the 

 arrangement of M. Agassiz. 



CTENOI'DIA. (from /crets, pecten, a 

 comb ; and e?<$os, Gr.) The third 

 order of fishes in the arrangement 

 of M. Agassiz. The ctenoidians 

 have their scales jagged on the 

 posterior margin, resembling the 

 teeth of a comb, from which cir- 

 cumstance they derive their name ; 

 the perch is an example. The 

 ctenoidians first appear at the 

 commencement of the cretaceous 

 formations, succeeding the placoi- 

 dean and ganoidian orders. Prof. 

 BucUand. 



CTENOPTI'CHIUS. A genus of icthyo 

 lites of the old red sandstone. 



CUBE. (from icv/3os, Gr. cubus, Lat. 

 cube, Fr. culo, It.) A regular 

 solid body consisting of six square 

 and equal faces, with right, and 

 therefore equal, angles : a die is a 

 small cube ; a prism contained by 

 six equal squares. 



CUBE-ORE. A name given to the 

 mineral hexahedral olivenite. 



CU'BIT. 



1. A measure, according to Dr. Ar- 

 buthnot, equal to one foot nine 

 inches, and 888 decimal parts. 

 Some. 



2. That part of the arm which 



extends from the elbow to the 

 wrist. 



CU'BIZITE. A name given by Werner 

 to analcime. 



CUBOI'DES. A bone of the foot, in 

 shape somewhat resembling a cube ; 

 it is placed at the fore and outer 

 part of the tarsus. 



CUCULLJEA. A genus of bivalve 

 equilateral, deep ; hinge straight, 

 shells; subquadrate, equi valve, sub- 

 with a series of angular teeth 

 small near the umbones, larger, 

 and more oblique towards the 

 extremities ; the umbones are sepa- 

 rated by a large flat area ; the 

 anterior muscular impression is 

 bordered by a raised, sharp-edged 

 plate or ledge, projecting from the 

 side of the shell. The recent 

 species of Cuculla3a are few, but 

 the fossil are very numerous; 

 upwards of 30 are recorded in Mr. 

 Morris's catalogue from the creta- 

 ceous, oolitic, carboniferous, and 

 Devonian systems of rocks, and 

 additional species are known, 

 though not described. Lycett. 



CUCU'LLATE. } (cucullatuSyL&i.) Hood- 



CUCU'LLATED ) ed ; having the shape 

 of a hood. Applied to leaves 

 when their edges meet in the 

 lower and expand towards the 

 upper part. 



CUCUMERI'NA. (from cucumer, Lat.) 

 A species of fossil spine belonging 

 to the echinus, and possessing 

 something of the form of a cucum- 

 ber, whence its name is derived. 

 There are several varieties. 



CUCU'MITES. The name given by Mr. 

 Bowerbank to a genus of fossil 

 fruits found in the London clay. 

 The generic characters are thus 

 given. " Pepo succulent, one cel- 

 led, many seeded. Seeds ovate, 

 enveloped in a thin membranous 

 arillus." All the parts of these 

 fruits so closely resemble those of 

 various members of the recent 

 genus Cucumis, both in their out- 

 ward form and their internal 



