ween the Oolite and the
New Red Sandstone.

LIGNIPERDOUS. A term applied to insects which destroy wood. _Etym._,
_lignum_, wood, and _perdo_, to destroy.

LIGNITE. Wood converted into a kind of coal. _Etym._, _lignum_,
wood.

LITHODOMI. Molluscous animals which form holes in the solid rocks in
which they lodge themselves. The holes are not perforated
mechanically, but the rock appears to be dissolved. _Etym._, [Greek:
lithos], _lithos_, stone, and [Greek: demo], _demo_, to build.

LITHOGENOUS POLYPS. Animals which form coral.

LITHOGRAPHIC STONE. A slaty compact limestone, of a yellowish color
and fine grain, used in lithography, which is the art of drawing
upon and printing from stone _Etym._, [Greek: lithos], _lithos_,
stone, and [Greek: grapho], _grapho_, to write.

LITHOIDAL. Having a stony structure.

LITHOLOGICAL. A term expressing the stony structure or character of
a mineral mass. We speak of the lithological character of a stratum
as distinguished from its zoological character. _Etym._, [Greek:
lithos], _lithos_, stone, and [Greek: logos], _logos_, discourse.

LITHOPHAGI. Molluscous animals which form holes in solid stones. See
"Lithodomi." _Etym._, [Greek: lithos], _lithos_, stone, and [Greek:
phagein], _phagein_, to eat.

LITHOPHITES. The animals which form Stone-coral.

LITTORAL. Belonging to the shore. _Etym._, _littus_, the shore.

LOAM. A mixture of sand and clay.

LOPHIODON. A genus of extinct quadrupeds, allied to the tapir, named
from eminences on the teeth.

LYCOPODIACEAE. Plants of an inferior degree of organization to
Coniferae, some of which they very much resemble in foliage, but all
recent species are infinitely smaller. Many of the fossil species
are as gigantic as recent Coniferae. Their mode of reproduction is
analogous to that of ferns. In English they are called club-mosses,
generally found in mountainous heaths in the north of England.

LYDIAN STONE. Flinty slate; a kind of quartz or flint, allied to
Hornstone, but of a grayish black color.

MACIGNO. In Italy this term has been applied to a siliceous
sandstone sometimes containing calcareous grains, mica, &c.

MADREPORE. A genus of corals, but generally applied to all the
corals distinguished by superficial star-shaped cavities. There are
several fossil species.

MAGNESIAN LIMESTONE. An ext