492 GLOSSARY. 



Lamellirostres (Lat. lamella, a plate ; rostrum, beak). The fiat-billed 



Swimming Birds {Natatorcs), such as Ducks, Geese, Swans, &c. 

 Larva (Lat. a mask). The insect in its first stage after its emergence from 



the egg, when it is usually ver}- different from the adult. 

 Larynx. The upper part of the windpipe, forming a cavity with appropriate 



muscles and cartilages, situated beneath the hyoid bone, and concerned in 



Mammals in the j^roduction of vocal sounds. 

 Lenticular (Lat. lens, a bean). Shaped like a biconvex lens. 

 Lepidodendron (Gr. lepis, a scale ; dendrcm, a tree). A genus of extinct 



plants, so named from the scale-like scars upon the stem left by the falling 



off" of the leaves. 

 Lepidoptera (Gr. lepis, a scale ; pteron, a wing). An order of Insects, com- 

 prising Butterflies and Moths, characterised by possessing four wings which 



are usually covered with minute scales. 

 Lepidota (Gr. lepis, a scale). Formerly applied to the order Dipnoi, con- 

 taining the Jilud-fishes {Lepiclosiren). 

 Leptocardia (Gr. leptos, slender, small ; cardia, heart). The name given by 



Miiller to the order of Fishes comprising the Lancelet, now called Phanjn- 



cjobranchii. 

 Lophophore (Gr. lopJios, a crest ; and phero, I carry). The disc or stage 



upon which the tentacles of the Polyzoa are borne. 

 LoPHTRoroDA (Gr. lophouros, having stifi" hairs ; and podes, feet). A section 



of Crustacea. 

 LoRiCATA (Lat. lorica, a cuirass). The division of Eeptiles comprising the 



Chelonia and Crocodilia, in which bony plates are developed in the skin 



{derma). 

 Lucernarida (Lat. lucerna, a lamp). An order of the Hydrozoa. 

 Lumbar (Lat. lumbus, loin). Connected with the loins. 

 Lunate (Lat. luna, moon). Crescentic in shape. 

 Lycopodiace^ (Gr. liipo^, a wolf ; pous, foot). The group of Cryptogamic 



plants generally known as " Club-mosses." 



jMacrura (Gr. maJcros, long; oura, tail). A tribe of Decapod Crustaceans 

 with long tails {e.g., the Lobster, Shrimp, &c.) 



Madreporiform. Perforated with small holes, like a coral ; applied to the 

 tubercle by which the ambulacral system of the Echinoderms mostly com- 

 municates with the exterior. 



Malacostraca (Gr. malakos, soft ; ostrakon. shell). A division of Crustacea. 

 Originallj' applied by Aristotle to the entire class Crustacea, because their 

 shells were softer than those of the Mollusca. 



JIammalia (Lat. mamma, the breast). The class of Vertebrate animals which 

 suckle their }'oung. 



Mani>ible (Lat. mandihulum, a jaw). The upper pair of jaws in Insects ; 

 also applied to one of the pairs of jaws in Crustacea and Spiders, to the beak 

 of Cephalopods, the lower jaw of Vertebrates, &c. 



Mantle. The external integument of most of the Mollusca, which is largely 

 developed, and forms a cloak in which the viscera are protected. Teclmi- 

 cally called the "pallium." 



Manus (Lat. the hand). The hand or fore - foot of the higher Verte- 

 brates. 



