LABIODENTAL. Formed or pronounced by 

 the co-operation of the lips and teeth. 



LABIPALPI. The labial feelers in insects : 

 two jointed sensiforous organs, which 

 emerge, one on each side, from the labium, 

 mostly near its summit. 



LABIUM. The lower lip of insects, to which 

 the labial palpi are attached : it is often 

 biarticulate. Also, the inner Up of a shell, 

 or that side of the aperture which is near- 

 est the axis, and generally contiguous to 

 the body whorl. 



LABRUM. The upper lip, when applied to 

 insects. Also, the outer lip of a shell ; or 

 the edge of the aperture at the greatest 

 distance from the axis. 



LAC, or GUM-LAC. A kind of resin depo- 

 sited on different species of trees in the 

 East Indies, by an insect called Chermes 

 lacca. It is variously combined, and much 

 used in the arts. 



LACERTINE. Resembling a lizard in form or 

 habits. 



LACHRYMAL. Generating or secreting tears. 



LACINIA. The blade of the maxillae, being 

 the fourth or apical portion. 



LACINIATE. Jagged, or cut into irregular 

 segments. 



LACINIFORM. When the base-covers of an 

 insect are long, of an irregular shape, and 

 appear like lappets on each side of the 

 trunk. 



LACTEAL. Pertaining to certain vessels in 

 animal bodies for conveying chyle from 

 the intestines to the common reservatory. 



LACTEOUS. White less intense than niveous. 

 The colour of chalk. 



LACTESCENT. Producing or abounding 

 with milk, or white juice. 



LACTIFEROUS. Bearing or conveying milk 

 or white juice ; as a lactiferous duct. 



LACUNOSE. Having the surface covered 

 with pits or shallow excavations. 



LAGOON. LAGUNE. A fen, moor, marsh, 

 shallow pond or lake ; as, the lagunes of 

 Venice. 



LAMB. The young of the sheep kind. 



LAMELLAR. Consisting of films or tliin 

 plates. 



LAMELLATED. Divided into distinct layers, 

 plates, or foliations. 



LAMELLIBRANCHIATE. Belonging to the 

 class of Acephalous Mollusca with gills in 

 the form of membranous plates. 



LAMELLIFORM. Shaped like a thin plate or 

 leaf. 



LAMINAE. Thin plates, laid one coat above 

 another. Hence also laminated, disposed 

 in layers, scales, or plates ; and lamina- 

 tion, arrangement in layers. 



LAMINATE. When the posterior coxae of 

 insects form a broad thin plate which covers 

 the trochanter and the base of the thighs. 



LANATE. Covered with fine, very long, 

 flexible and rather curling hairs like wool. 



LANCEOLATE. Flat, oblong, and gradually 

 tapering to a sharp point, like the head of 

 a lance. 

 LANIARIFORM. Shaped like the canine teeth 



of the camivora. 



LANIFEROUS. Bearing or producing wool. 

 LANUGINOSE. LANUGINOUS. Covered with 

 longish, very soft, fine down. 



LARVA. The first active stage in an insect's 

 life ; the caterpillar state, or that which 

 precedes the chrysalis and perfect insect. 



LARVAL. Pertaining to larvae, or insects in 

 the caterpillar state. 



LARVATE. Masked, as a larva or cater- 

 pillar. 



LAKVIFORM. Shaped like a larva. 



LARVIPAROUS. Relating to the larvipara, 

 viz. those insects which produce their 

 young in the condition of larvae, instead of 

 eggs. 



LARYNQEAL. Pertaining to the larynx. 



LARYNX. The upper part of the windpipe 

 or trachea. 



LATERAL. Placed at the side, or extending 

 from one side to the centre. 



LATERAL TEETH (in shells). Those teeth 

 which taking their rise near the umbones 

 proceed to some distance towards the sides 

 of the shell. 



LATERITIOUS. Of the colour of brickdust. 



LATESCENCE. Tendency to milk; milkiness 

 or milky colour. 



LATITUDE. The distance of any place on 

 the globe, north or south of the equator. 



LATTICED. Formed with cross bars or open 

 squares like net-work. 



LAY. To produce eggs. 



LEGUMINOUS. Pertaining to pulse, as peas, 

 beans, &c. 



LEMNISCUS. (A riband, Lat.) A term ap- 

 plied to the minute riband-shaped appen- 

 dages of the generative pores in Entoaza. 



LENTICULAR. Doubly convex, of the form of 

 a lens : i. e. having the opposite sides con- 

 vex and meeting in a sharp edge. 



LEPIDOPTEROUS. Pertaining to the Lepi- 

 doptera, the order of insects in which the 

 wings are clothed with fine scales, as But- 

 terflies and Moths. 



LEPORINE. Pertaining to, or having the 

 nature or qualities of the hare. 



LETHARGIC. Preternaturally inclined to 

 sleep. 



LEVIGATE. Without any partial elevations 

 or depressions. 



LIBIDINOUS. Lustful. 



LIGAMENT. A strong compact substance, 

 softer than a cartilage, but harder than a 

 membrane, serving either to bind one bone 

 of an animal to another, or to connect the 

 valves in bivalve shells. " There is ano- 

 ther substance," says Sowerby, " called by 

 Gray the cartilage, which is elastic and 

 of a condensed fibrous structure, placed 

 within the ligament, either close to it, or 

 at a more interior part of the shell ; it is 

 sometimes contained in a pit formed for 

 its reception, in the centre of the hinge. 

 This substance being elastic, keeps the 

 valves open, unless drawn together by the 

 counteracting force of the adductor mus- 

 cles. When conchologists speak of a shell 

 as haying the ligament external, the real 

 meaning is that these two substances are 

 so close together, as in appearance to con- 

 stitute one body." 



LIGAMENTAL. LiGAMENTOUS. Of the na- 

 ture of a ligament ; as a ligamentous mem- 

 brane. 



LIGNEOUS. Composed of a hard unelastic 

 substance like wood. 



