GLOSSARY. 



173 



F. 



Falcated, bent or hooked like a scythe. 



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 chamber of the shell, by 

 looking in at the aperture. 



Ferruifinous, of an iron colour, or rust 

 coloured. 



Filament, a slender thread-like pro- 

 cess. 



Filiform, thread-shaped, slender and 

 of equal thickness. 



Umbriated, 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 lamina; or 

 leaves. 



Foliated, bent into laminae or leaves. 



Fornix, the exc;ivated part under the 

 umbo. It likeu'ise 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. 



Furrow, a sm ill trench or ho'low. 



Fuscated, darkened, obscured. 



Fusiform, spindle-shaped, intermedi- 

 ate between the conical and oval. 



Gap, an opening in bivalves when the 

 valves are shut as in the Pholades, 

 Mii<B, Sec. 



Geniinated, marked with a double ele- 

 vated striae connecting the wreathes. 



Geniculate, keeled. 



Genus, an assemblage of species pos- 

 sessing certain characters in c<im. 

 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 

 bead--. 



Groove, a hollow channel. 



H. 



Hemispherical, ii the slmpo of a half 

 globe. 



Hirsute, rough, beset with strong 

 hairs. 



Heteroclitical, synonymous with ho- 

 terostrophe. 



Heterostrophe, reversed, applied to 

 shells whoi^e spires turn in a con- 

 trary direction to the usual way. 



Hispid, hairy. 



I&J 



Jigged, 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. 



luEequivah e, where one valve is more 

 convex than the other, or dissimilar 

 in other respects, as iu the common 

 oyster. 



Inarticulate, indistinct, not properly 

 formed. 



Incumbent, one lying over the other. 



Incurvated, l''*^"* inwards, crooked. 

 Indented, unequally marked, hollow- 



ed. 

 Inflated, tumid, swolleo, as if blown 



out. 

 Inflected, bent inwards. 

 Iiiflexed, bent towards each other. 

 I.itercostal, placed between the ribs. 

 Internode, the space between one 



knot or joint and anoiher. 

 Interrupted, divided, separated. 

 Interstice, space between one part and 



another, a crevice. 

 Intortion, the turning or twisting in 



any particular direction. 

 Involucre, a covering, 

 luvolution, that part which involves 



or inwraps another. 

 Involute, where the exterior lip is 



turned inwards, at the margin, as lu 



the Cypreae. 

 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 

 the Argonauta. 



Knob, a protuberance, any part blunt- 

 ly arising above tlie rest. 



Lnbra, the lips. 



Laciiiiate, jagged or cut into irregular 



segments. 

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