22? 



GLOSSARY. 



Callosity, a smooth protuberance. 



Callus, "a deposition of calcareous 

 matter. 



CampaniJate, bell-shaped. 



Canaliculated, made like a pipe or 

 gutter. , 



Cancellated, Ionc;itudinally and 

 transversely ribbed. 



Carinated, having a longitudinal 

 prominence like the keel of a 

 vessel. 



Cartilage, a flexible fibrous sub- 

 stance by which the valves are 

 united, situated near the beak. 



Cauda, the elongated base of the 

 venter, lip, and columella. 



Cicatrix, the glossy impres.sion in 

 the inside of tlie valves, to which 

 the muscles of the animal are 

 aifixed. 



Ciliate, edged with parallel hairs, 

 bristles or appendages, like the 

 eye-lids. 



Cinereous, of the colour of wood 

 ashes. 



Clavate, club-shaped, thicker to- 

 wards the top, elongated towards 

 the base. 



Cochleae, shells of one piece, uni- 

 valves. 



Cochleate, twisted like a screw or 

 the shell of a snail. 



Columella, the itpright pillar in the 

 centi'e of most of the univalve 

 shells. 



Commissure, a joint or seam. 



Complicated, doubled together. 



Compressed.squeezed together per- 

 pendicularly, in opposition to de- 

 pressed, which is flattened hori- 

 zontally. 



Concamerated, arched over, vault- 

 ed. 



Concamerations, di\aded into com- 

 partments, as in the Nautili. 



Concave, hollowed out like a bowl. 



Concentric, surrounding a centre. 



Conchte, shells consisting of tv.-o or 

 ixiore pieces or valves, bivalves, 

 or m'oltivalves. 



Cone, the form of a sugar-loaf. 



Confluent, lamuing together. 



Conoid, a figure like a cone, sugar- 

 loaf-shaped. 



Contorted, twisted, or incumbent 

 on each other, in an oblique di- 

 rection. 



Contracted, shortened, shrunk up. 



Convoluiud, rolled upon itself, 

 t^^isted spirally, like a piece of 

 pa])er rolled between the finger 

 and thumb. 



Cordate, heart-shaped. 



Cordiform, resembhng the form ot 

 a heart. 



Coriaceous, of a leather-like con- 

 sistence. 



Corneous, of a horn colour, re- 

 sembhng a liorn. 



Coronal, relating to the croAin or 

 top. 



Coronated, crowned, or gu't to- 

 wards the apex. 



Costated, ribbed, having large 

 ribs. 



Coi-pus, the body of the shell, the 

 last or great wreath in w liich the 

 apertui'e is situate. 



Cortex, the anterior sldn or epi- 

 dermis. 



Creniilated, notched at the margin, 

 scalloped. 



Crispated, rough with waving lines 

 or curled. 



Cuiieifoi'm, shaped like a wedge. 



Cylindrical, round hke a cyUuder 

 or a roller. 



Cymbiform, boat-shaped. 



D. 



Decorticated, worn, divested of epi- 

 dermis or skin. 



Decussated, generally applied to 

 striae, or lines, which are crossed, 

 or which intersect each other 

 periieudicularly and horizon- 

 tahy. 



Deflexed, bent aside. 



Dentary, of or belonging to the 

 teeth. 



Denticle, a small tooth, such as tlie 

 tooth of a saw. 



Denticulated, set with small teeth, 

 as in Area. 



Depi'essed, pressed down horizon- 

 tally, low, shallow, flat. 



Dexter valve, the right valve. 



Diaphanous, transparent, clear, 

 that can be seen through. 



Digitated, fingered or clawed, as 

 in the lobes of the outer hp of 

 the Strombi, &c. 



Disk, the middle part of the valves, 

 or that w'hicli lies bet'.veen the 

 umbo and the margin. 



Divaricated, straddMng, spreading 

 out widely. 



Divergent, tending to various parts 

 or directions from one point. 



Dorsum, the back: it generally 

 means the upper surface of the 

 body of the shell, a\ hen laid upon 

 the aperture or opening. In the 

 genera of Patella and Ilahotis, 



