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CREST. A tuft of feathers on the head of 

 certain birds. 



CRESTED. Adorned with a crest or plume. 



CRESTLESS. Without a crest. 



CRETACEOUS. Abounding with chalk ; hav- 

 ing the quality of chalk. 



CRIBRIFORM. Resembling a sieve : a term 

 in anatomy, applied to the lamin of the 

 ethmoid bone, through which the fibres of 

 the olfactory nerve pass to the nose. 



CRINITE. Covered with long thin hair ; 

 having the appearance of tufts of hair. 



CRINOID. Belonging to the Crinoideans, or 

 Echinodermata, fossils which resemble 

 lilies 



CRISP ATED. Curled, or rough with waving 

 lines. 



CRISTATE. Having one or two very elevated 

 lines, usually crenate. 



CROCODILIAN. Relating to the crocodile or 

 other Saurian reptiles. 



CROP. The first stomach of a fowl ; the 

 craw. 



CRUCIATE. Divided to the middle into four 

 opposite arms, the angles being either four 

 right ones, or two obtuse and two acute. 



CHUCIATO-COMPLICATE. When the wings 

 (of an insect) are crossed and folded. 



CRUCIATO-INCUMBENT. Wings crossed but 

 not folded, and covering the back. 



CRUCIFORM. Disposed in the form of a 

 cross. 



CRURA. Processes resembling legs. 



CRURAL. Belonging to the leg. 



CRUSTACEOUS. Belonging to the class of 

 articulated animals termed Crustacea, 

 having a soft and jointed shell ; as the 

 crab, lobster, shrimp, &c. 



CRUSTACEOLOGY. That part of zoology which 

 treats of crustaceous animals, arranging 

 them in orders, tribes, and families, and 

 describing their forms and habits. 



CRYPTOBRANCHIATE. Pertaining to those 

 molluscous and articulate animals which 

 have no conspicuous gills. 



CRYSTALLINE. The white splendour of 

 crystal or glass. 



CUBICAL. Six-sided, with sides quadrate. 



CUBOID. CUBOIDAL. Having the form of a 

 cube, or differing but little from it. 



CUCULLATE. When the prothorax is ele- 

 vated into a kind of ventricose cowl or 

 hood which receives the head. 



CUCUMIFORSI. Cucumber-shaped : whose 

 longitudinal section is oblong, and trans- 

 verse circular. 



CULICIFORM. In form resembling a flea. 



CULMEN. That part of the upper mandible 

 of a bird which runs along the middle and 

 often slopes on each side. 



CULTRATE. CULTRATED. Straight on one 

 side and curved on the other. Sharp-edged 

 and pointed ; as, the beak of a bird is con- 

 vex and cultrated. 



CULTRIFORM. A three-sided body with two 

 equal sides large and the third small. 



CUNEATE. CUNEATED. CUNEIFORM. Shaped 



like a wedge. Having the longitudinal 

 diameter exceeding the transverse, and 

 narrowing gradually downwards. 



CUPREOUS. Of the bright colour of ne 

 copper. 



CURSORIAL. Adapted for running. 



CUSPIDATE. Terminating in a long setiform 



point. 

 CUTANEOUS. Existing on or affecting the 



ikin. 

 CUTICLE. A thin pellucid membrane cover- 



ing the true skin. 

 CUTICULAR. Pertaining to the cuticle or 



external coat of the skin. 

 CYCLOBRANCHIATA. Those molluscous ani- 



mals which have the gills disposed in a 



circle. 

 CYLINDRICAL. A mathematical form, which 



like many others, is used by conchologists 



with great latitude, and applied to any 



shell the body of which is somewhat 



straight, with the ends either rounded, 



flat, or conical. 

 CYLINDRIFORM. Having the form of a 



cylinder. 

 CYMBIFORM. Shaped like a boat. When 



the margin of the thorax and elytra of 



an insect are recurved so as to give a body 



the resemblance of the inside of a boat, 



they are said to be cymbiform. 

 CYST. A bag or tunic which includes morbid 



matter in animal bodies. 



DECAPODOUS. Pertaining to those crusta- 

 ceous and molluscous animals which have 

 ten feet. 



DECATON. The tenth segment of insects. 



DECIDUOUS. Parts which are annually shed, 

 or do not last the lifetime of the animal. 

 A shell is described as deciduous where 

 there is a tendency in the apex of the spire 

 to fall off. 



DECOLLATED. The term applied to univalve 

 shells in which the apex or head is worn 

 off in the progress of growth. This hap- 

 pens more particularly to those shells 

 whose apex or nucleus is composed of a 

 transparent glassy substance, much more 

 fragile than the rest ; and this part being 

 deserted by the animal, which lives in the 

 lower whorls, it is exposed to accident and 

 the decomposing power of water : it con- 

 sequently falls off, and is then said to be 

 decollated. 



DECORTICATED. Divested of the epidermis 

 or skin. 



DECUSSATED. An epithet generally applied 

 to striae or lines which are crossed, or 

 which intersect each other perpendicularly 

 or horizontally. 



DEDENTITION. The shedding of teeth. 



DEFLEXED : DEFLECTED. Bent down ; bent 

 or turned aside. When the wings of in- 

 sects at rest, covering each other, are so 

 bent downwards as to imitate a roof, of 

 which their interior margin forms the 

 ridge. 



DEHISCENCE. The splitting open of the bag 

 containing the insect's eggs. 



DEHISCENT. When the base-covers diverge 

 a little at the apex. 



DELTOID. Triangular. 



DENDRITIC. Branched like a tree. 



DENTARY. Relating to dentition, or to the 

 teeth ; as the dentary system. 



DENTATE. DENTATED. Toothed; having 

 tooth-like processes. 



DENTICLE. A small tooth or projecting 

 point, like the tooth of a fine saw. 



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