174 



GLOSSARY. 



Lacunose, having the surface covered i 

 A^ith pits. 



Lamellar, consisting of films on plates. | 



Lamellated, divided into distinct plaits 

 or foliations. 



Laminae, thin plates, laid one coat 

 above another. 



Lant-eolate, oblong, and gradually ta- 

 perin J like tiie liead of a lance. 



Lateral, extending to one side, from 

 the centre. 



Latticed, having longitudinal lines or 

 furrows, decussate by transverse 

 ones. 



Lenticulate, doubly convex, of the 

 form of a lens. 



Ligament, a solid body, soft.T than a 

 cartilage, but harder than a mem- 

 brane, which connects the valves in 

 bivalves. 



Limb, the margin of bivalve shells. 



Linear, composed of lines. 



Lineate, marked with lines. 



Lip, the r)uter edge of the aperture of 

 univalves. 



Littoral, of or belonging to the shore. 



Lobated, rounded at the edges. 



Longitudinal, the length of the shell 

 from the apex to the base. 



Lubricity, slipperiness, smoothness of 

 surface. 



Lunated, formed like a half moon. 



Lunulated, crescent-shaped. 



Lunule, a crescent-iike mark or spot 

 situated ne^ir the anterior and pos- 

 terior slopes in bivalve shells. 



Luniform, in the shape of a crescent. 



M. 



Margin, the whole circumference or 

 outline of the shell in bivalves. 



Marginated, having a prominent mar- 

 gin or border. 



Membrane, a web of several sorts of 

 fibre---. 



Membranaceous, consisting of mem- 

 branes. 



Mottled, clouded or spotted with vari- 

 ous colours. 



Mucronate, ending in a sharp rigid 

 point. 



Multilocular, many-chambered, con. 

 sisting of several divisions. 



Muricated, clothed with sharp spines. 



Nacred, pearly, pearlaceous. 

 Nemoral, of or belonging to a wood. 

 Nited, ghissy. 

 Nodose, knotty. 

 Nucleus, a kernel. 



Ob, prefixed to words is used for in- 

 versely or inverted; as obconic. 



inversely conic; obcordate, inversely 

 heart-shaped. 



Oblong-ovate, egg-shaped or oval. 



Obsolete, indistinct, not well defined. 



Oceliated, applied to eye-like spnts. 



Ochreous, of the colour of yellow 

 ochre. 



Oifuscated, darkened, clouded, dim- 

 med. 



Olivaceous, being of a greenish olive 

 colour. 



Operculum, a lid which closes the 

 aperture of some turbinated uni- 

 valves ; and also some of the tops of 

 multivalves. 



Orbicular, spherical, circular, ronnd. 



Order, the second division of the ani- 

 mal kingdom. Orders are made up of 

 a plurality of genera. 



Orifice, an opening or perforation. 



Ovate, shaped like the longitudinal 

 section of an egg. 



Ovoid, oval. 



Palmated, webbed, as in the feet of 



some water birds. 

 Papillse, small dots or pimples. 

 Papillary, I having the surface covered 



Papillous, i with dots or pimples. 



Papillose, pimpled, dotted. 



Papyraceous, thin as paper. 



Parasitical, living on some other body. 



Patulous, with a gap or opening. 



Peariaceous, of or like mother-of- 

 pearl. 



Partitions, calcareous processes, divid- 

 ing the shells of the genus Nautilusi 

 Serpula, &c. 



Pectinated, resembling the teeth of a 

 comb. 



Pedicle, the support of the Lepas 

 Aiiatifera and its corresponding 

 species, by which they are attached 

 to wood, ice. 



Peduncle, a foot stalk or tube on which 

 any thing is seated. 



Pediform, foot-shaped. 



Pelagic, beliM ging to the deep sea. 



Pellicle, the skin or film. 



Pellucid, transparent, clear, bright. 



Pentagonal, having five angles. 



Perforated, pierced with holes. 



Pervious, admitting pas-sage. 



Phosphorescent, emitting light in the 

 dark. 



Pillar, in univalves is the internal con. 

 tinuation of the columella, or inner 

 lips, and extends from tlie bciselo 

 the apex. 



Pinnated, winged. 



Plaited, folded. 



Plaits, folds. 



Plicated, folded or plaited, as in the 

 pillar of the volute tribe. 



Plumose, having a feathery apptiir- 

 auce. 



