GLOSSARY. 



179 



Equidistant, being at the same dis- 

 tance. 



Equilateral, having all sides alike. 



Equivalve, having both valves of equal 

 dimensions. 



Exolete, worn or faded. 



Exscrted, standing out, protruding. 



Extraneous, not belonging to a par- 

 ticular thing. 



Falcated, bent or hooked like a scythe. 



Fasciated, filleted, or covered with 

 bands. 



Fascicled, clustered together as in a 

 bundle. 



Fasciculated, consisting of little bun- 

 dles. 



Fastigate, flat and even at top. 



Faux, what can be seen of the cavity 

 of the first chamber of the shell, by 

 looking in at the aperture. 



Ferruginous, of an iron colour, or rust 

 coloured. 



Filament, a slender threadlike process. 



Filiform, thread-shaped, slender, and 

 of equal thickness. 



Fimbriated, fringed. 



Fissure, a cleft, a little slit, or narrow 

 chasm. 



Flexuous, zigzag, with angles gently 

 winding. 



Flexure, a bending. 



Fluviatic, of or belonging to a river. 



Fluviatile, belonging to fresh water. 



Foliaceous, consisting of lamias or 

 leaves. 



Foliated, bent into lamince or leaves. 



Fornix, the excavated part under the 

 umbo. It likewise signifies the up- 

 per, or convex shell in the Ostrea. 



Fragile, brittle, easily broken. 



Front, in univalves, when the aperture 

 is turned towards the observer. 



Furcated, forked. 



Furrow, a small trench or hollow. 



Fuscated, darkened, obscured. 



Fusiform, spindle-shaped, intermedi- 

 ate between the conical and oval. 



G. 



Gap, an opening in bivalves when the 

 valves are shut as in the Pholades, 

 MycE, &c. 



Geminated, marked with a double ele- 

 vated stris connecting the v^reaths. 



Geniculate, keeled. 



Genus, an assemblage of species pos- 

 sessing certain characters in com- 



mon, by which they are distinguish- 

 ed from all others. 



Genera, the plural of genus. 



Gibbous, bulged or bulging. 



Glabrous, smooth, having a smooth 

 surface. 



Globose, globular. 



Granulated, beaded, in small grains or 

 beads. 



Groove, a hollow channel. 



H. 



Hemispherical, in the shape of a half 

 globe. 



Hirsute, rough, beset with strong 

 hairs. 



Heteroclilical, synonymous with het- 

 erostrophe. 



Heterostrophe, reversed, applied to 

 shells whose spires turn in a con- 

 trary direction to the usual way. 



Hispid, hairy. 



I&J. 



Jagged, denticulated, uneven, toothed 

 like a saw. 



Imbricate, placed like the tiles of a 

 house. 



Imperforated, not pierced with a hole, 

 wanting an umbilicus. 



Inequilateral, when the anterior and 

 posterior sides make different an- 

 gles with the hinge. 



Inequivalvc, where one valve is more 

 convex than the other, or dissimilar 

 in other respects, as in tlie common 

 oyster. 



Inarticulate, indistinct, not properly 

 formed. 



Incumbent, one lying over the other. 



Incurved, ) . . • j i j 



T . J ? bent mward, crooked. 



Incurvated, ) ' 



Indented, unequally marked, hollow- 

 ed. 



Inflated, tumid, swollen, as if blown 

 out. 



Inflected, bent inward. 



Inflexed, bent towards each other. 



Intercostal, placed between the ribs. 



Internode, the space between one 

 knot or joint and another. 



Interrupted, divided, separated. 



Interstice, space between one part and 

 another, a crevice. 



Intortion, the turning or twisting in 

 any particular direction. 



Involucre, a covering. 



Involution, that part which involves or 

 inwraps another. 



