386 PRINCIPLES OF ANIMAL BIOLOGY 



Lamella {la meV la). A layer. 



Lamprey {lamf pri). An eel-like animal of the class Cyclostomata. 



Lampsilis {lamp' si lis) . A genus of freshwater mussels. 



Large intestine {larf in tes' tin). The enlarged portion of the digestive tract following 



the small intestine. 

 Larva {lar' va). A free-living developmental stage of an animal in which certain 



adult organs are still lacking or in which organs are present that are lacking in the 



adult. 

 Larynx {lar' inks). An enlargement of the anterior end of the trachea, in which the 



vocal cords are located. 



Latreille, Pierre (approximately lah tray'). French zoologist, 1762-1833. 



Lecithin {les' i thin). One of a number of lipoid substances common in egg jolk, 

 nerve tissue, and other kinds of cells. 



Leeuwenhoek, Antonius von {la' wen hook) . Dutch naturalist and microscopist, 



1632-1723. 

 Leiolopisma {le' yo lo piz' ma). A genus of skinks (lizards). 

 Lemming {le7n' ming). A rodent of the family Muridse, to which the rats, mice, and 



muskrats belong. 



Lepas anatifera {le' pas an' a tif er a). A species of barnacle (subclass Cirripedia 

 of the Crustacea). The goose barnacle. 



Leptinotarsa {lep' tin o tar' sa) . A genus of leaf-eating beetles to which the common 



potato beetle belongs. 

 Leptodactylus {lep' to dak' ti lus). A genus of frogs. 



LernaBopoda edwardsii {ler' ne op' o da ed ward/ ii). A copepod (Crustacea) parasitic 

 on the gills of certain fishes. 



Levulose {lev' u lose). Fruit sugar. 



Lignin {lig' nin). A substance mixed with the cellulose in the cell walls of woody 



plants. 

 Limax {W maks). A genus of slugs (gastropod mollusks). 

 Linear {lin' e ar). Arranged in a line or row. 



Lingula {ling' gu la). A genus of brachiopods, a group of uncertain relationships. 

 Linin {W nin). The substance of the fine network of the nucleus of a cell on which 



the chromatin is located. 

 Linkage {link' aj). The occurrence of the genes for two or more hereditary characters 



in the same germ cell more frequently than the operations of chance would require. 



Linnaeus, Carolus {lin ne' us). Sec Linng. 



Linne, Carl von {lin nay'). Swedish botanist and naturalist, author of the binomial 



system of nomenclature and an artificial classification of animals and plants, 



1707-1778. 

 Lipase {W pase). A fat-splitting enzyme. 



Lipoid {lip' oid). One of a group of substances whose chemical and physical proper- 

 ties resemble those of fats. 



Lipolytic {lip' o lit' ik). Fat-splitting. 



Lister, Joseph {lis' ier). English surgeon, 1827-1912. 



Lithobius forficatus {lith a' hi us for' fi ka' tus). A species of centipede, phylum 



Arthropoda, class Myriapoda. 

 Liver {liv' er). A gland which secretes bile and other substances. 



