GLOSSARY. 



173 



Falcated, bent or hooked liko asryihp. 



Fasciated, filleted, or covered "with 

 bands. 



Fascicled, clustered together as in a 

 bundle. 



Fasciculated, consisting- of little 

 bundles. 



Fastigate, flat and even at top. 



Faux, what can be seen of the cavity 

 of the first chrimher of the shell, by 

 looking- in at the aperture. 



Ferruginous, of an iron colour, or rust 

 coloured. 



Filament, a slender thread-like pro- 

 cess. 



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.' 



Foliaeeous, consisting of laminae or 

 leaves. 



Foliated, bent into laminae or leaves. 



Fornix, the excavated part under the 

 umbo. It likewise signifies the 

 upper, or convex shell in the Ostrea. 



Fragile, brittle, easily broken. 



Front, in univalves, when the aper- 

 ture is turned towards the observer. 



Furcated, forked. 



Farrow, a small trench or hollow. 



Fuscated, darkened, obscured. 



Fusiform, spindle-shaped, intermedi- 

 ate between the conical and oval. 



G. 



Gap, an apening in bivalves when the 

 valves are shut as in the Pholades, 

 My(B, &c. 



Geminated, marked with a double ele- 

 vated strise connecting the wreathes. 



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, beadedj iu small grains or 

 beads. 



Groove, a hollow channel. 



H. 



Hemispherical, in the shape of a half 

 globe. 



Hirsute, rougli,. beset with strong 

 hairs. 



Heteroclitical, synonymous with he- 

 terostrophe. 



Heterostrophe, reversed, applied to 

 shells whose spires turn in a con- 

 trary directi<m 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. 

 Insequilateral, when the anterior and 



posterior sides make different an- 

 gles with the hinge. 

 Inaequivalve, where one valve is more 



convex than the other, or dissimilar 



in other respects, as in the common 



oyster. 

 Inarticulate, indistinct, not properly 



formed. 

 Incumbent, one lying over the other. 

 Incurved, i u I • j i j 



Incurvated, r'^"* awards, crooked. 

 Indented, unequally marked, hollow- 



ed. 

 Inflated, tumid, swollen, as if blown 



out. 

 Inflected, bent inwards. 

 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 ia 



any particular direction. 

 Involucre, a covering. 

 Involution, that part which involves 



or inwraps another. 

 Involute, where the exterior lip is 



turned inwards, at the margin, as in 



the Cyprea?. 

 Isabella-colour, a brownish yellow 



with a shade of brownish red. 

 Juncture, the joining of the whorl in 



univalve shells. 



K. 



Keel, the longitudinal prominence in 

 j the Argonauta. 



• Knob, a protuberance, any part blunt- 

 ly arising above the rest. 



Lfihra, the lips. 



Laciniate, jagged or cut into irregular 



segments. 

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