Lingual

(Lat. lingua, the tongue). Connected with the tongue.

Lissencephala

(Gr. lissos, smooth; egkephalos, brain). A primary division of Mammalia, according to Owen, in which the cerebral hemispheres are smooth or have few convolutions.

Lithocysts

(Gr. lithos, a stone; kustis, a cyst). The sense-organs or "marginal bodies" of the Lucernarida or Steganophthalmate Medusae.

Longipennatae

(Lat. longus, long; penna, wing). A group of the Natatorial Birds.

Longirostres

(Lat. longus; rostrum, beak). A group of the Wading Birds.

Lophophore

(Gr. lophos, a crest; and phero, I carry). The disc or stage upon which the tentacles of the Polyzoa are borne.

Lophyropoda

(Gr. lophouros, having stiff hairs ; and podes, feet). A section of Crustacea.

Lortca

(Lat. a breast-plate). Applied to the protective case with which certain Infusoria are provided.

Loricata

(Lat. lorica, a cuirass). The division of Reptiles 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.

Lyencephala

(Gr. luo, I loose; egkephalos, brain). A primary division of Mammals according to Owen.

Macrodactyli

(Gr. makros, long; daktulos, a finger). A group of the Wading Birds.

Macrura

(Gr. makros, 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 communicates with the exterior.

Malacostraca

(Gr. malakos, soft; ostrakon, shell). A division of Crustacea. Originally applied by Aristotle to the entire class Crustacea, because their shells were softer than those of the Mollusca.

Mallophaga

(Gr. mallos, a fleece; phago, I eat). An order of Insects which are mostly parasitic upon birds.

Mammalia

(Lat. mamma, the breast). The class of Vertebrate animals which suckle their young.

Mandible

(Lat. mandibulum, 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, etc.

Mantle

The external integument of most of the Mollusca, which is largely developed, and forms a cloak in which the viscera are protected, Technically called the "pallium."

Manubrium

(Lat. a handle). The polypite which is suspended from the roof of the swimming-bell of a Medusa, or from the gonocalyx of a medusiform gonophore amongst the Hydrozoa.

Manus

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