GLOSSARY. 
159 
Filiform, thread-shaped, slender. | Inequilateral, when the anterior 
Fimbriated, fringed. 
Fissure, a cleft or slit. 
Flexuous, zigzag, with angles 
widening. 
Flexure, a bending. 
Fluviatile, belonging to fresh 
water. 
Foliaceuus, lamina or leave- 
shaped. 
Fragile, brittle, easily broken. 
Front, the aperture next the 
observer. 
Furcated, forked. 
Furrow, a trench or hollow. 
Fuscated, darkened, obscured. 
Fusiform, spindle-shaped, coni- 
cal, or oval. 
G. 
Gaping, when the valves do not 
close. 
Geniculate, kéeled. 
Genus, characters by which 
they are distinguished from 
others, 
Genera, plural of genus. 
Gibbous, bulged. 
Glabrous, having a smooth sur- 
face. 
Globose, globular, round. 
i. 
Hemispherical, in the shape of 
a half globe. 
Heterostrophe, _ shells 
spires reverse. 
Hispid, hairy. 
Hinge, the part where the 
valves are united. 
whose 
T&F: 
Jagged, denticulated, uneven. 
Imbricate, covered with scales. 
_ Imperforate, having no umbili- 
cus. 
and posterior parts of the 
shell are dissimilar. 
Inequivalve, when the valves 
are dissimilar. 
Inarticulate, indistinct. 
Incumbent, one lying over the 
other. 
Incurved, bent backward. 
Indented, unequally marked. 
Inflated, tumid, swollen. 
Inflected, bent inward. 
Inflexed, bent towards each 
other. : 
Intercostal, placed between the 
. ribs. 
Interrupted, divided, separated. 
Interstice, space between. 
Intortion, turning or twisting. 
Involute, without a spire. 
Involution, that part which in- 
volves another. 
Juncture, the joining of the 
whorl in univalves. 
Ke 
Keel, the longitudinal promi- 
nence in the Argonauta. 
Keeled, see Carinated. 
i. 
Labra, the lips. 
Laciniate, cut in irregular seg- 
ments. 
Lacunodse, surface covered with 
pits. 
Lamellar, films on plates. 
Lamellated, divided into distinct 
plaits or foliations. 
Lamine, thin plates, laid one 
above another. 
Lanceolate, oblong, tapering 
like the head of a lance. 
Lateral, extending to one side 
from the centre. 
Latticed, see Decussated. 
