L I M 



Gasteropoda ; and by Lamarck in 

 the family Limnacea. The Limnea 

 is an ovate-conical, or turretted 

 univalve, it has an oblong spire, 

 and the aperture higher than it is 

 wide ; it may be distinguished 

 from the lulini by the very oblique 

 fold on the columella. The Limnea 

 has been found fossil in the neigh- 

 bourhood of Paris. The recent 

 Limnea inhabits our lakes and 

 pools ; its shell is of a light amber 

 colour. 



LIM'NITE. A fossil limnea. 



LIM'OPSIS. The name assigned by 

 Sassi to a genus of bivalve conchi- 

 fera, belonging to the family 

 Arcacea. 



LI'MULUS. The Molucca crab. A 

 genus of crustaceans, or entomos- 

 tracans, having a distinct carapace 

 or buckler, with two eyes in front 

 of the shield. The limulus appears 

 to approximate towards the trilo- 

 bite, and Buckland says, " the 

 history of this genus is important, 

 on account of its relations both to 

 the existing and extinct forms of 

 crustaceans ; it has been found 

 fossil in the coal formations of 

 Staffordshire and Derbyshire, and 

 in the Jurassic limestone of Aich- 

 stadt, near Pappenheim; a small 

 fossil species is found in the iron- 

 stone nodules of Coalbrook Dale. 

 Of the tail of the recent limulus, 

 savages form a point to their 

 arrows; and, when thus armed, 

 they are much dreaded. The eggs 

 of the limulus are eaten by the 

 Chinese. 



LINE OF BEAMING. | Strata almost al- 



LINE or DIP. j ways decline, 

 or dip down, to some point of the 

 horizon, and, of course, rise towards 

 the opposite point. A line drawn 

 through these points is called the 

 line of their dip. If a book be 

 raised in an inclined position, with 

 the back resting lengthwise upon 

 the table, the leaves may be sup- 

 posed to represent different strata, 



[ 260 ] LIE 



then a line descending from the 

 upper edges to the table, will be the 

 line of dip, and their direction 

 lengthwise will be their line of 



LINES OF GBOWTH. In conchology, 

 those concentric lines or markings 

 in a shell, formed by successive 

 layers of shelly matter, which mark 

 its growth. The external layer is 

 always the most recent. 



LINEAR, (linearis, Lat.) 



1. In entomology, a figure having 

 the lateral margins very close 

 together, and parallel throughout. 



2. In conchology, composed of 

 lines ; being marked with lines. 



3. In botany, a term applied to 

 narrow leaves, when they are of 

 equal breadth throughout, the two 

 edges being straight, and equi-dis- 

 tant from each other. 



LI'NEATE, (lineatus, Lat.) Marked 

 with lines; marked with longitu- 

 dinal depressions. 



LI'NGULA. A genus of bivalve shells 

 composed of two valves, nearly 

 equal, truncated anteriorly; the 

 hinge having no teeth : the beak 

 of the valves pointed, and united 

 to a tendinous tube, serving for a 

 ligament ef attachment. This is 

 the only bivalve shell which is 

 pedunculated. The recent lingula 

 inhabits the Indian ocean ; it has 

 thin, horny, and greenish valves. 

 It is also found fossil in the Ludlow 

 limestone, and in the oolitic rocks 

 of Yorkshire. 



LI'NGULATE. (lingulatm, Lat.) 

 Tongue-shaped ; an epithet for 

 leaves shaped like a tongue. 



LIQTJEFA'CTION. (liquefactio, a melt- 

 ing, Lat. liquefaction, Fr. liquefa- 

 zi6ne, It.) The act of melting; 

 the state of being melted. This 

 word is sometimes used synony- 

 mously with fusion, sometimes 

 with deliquescence, and at others 

 with solution. 



LI'BICONITE. (from \eipos, pale, and 

 sand or dust, Gr.) A name 



