140 



Index and Glossary. 



LAB 



LABIUM, the lower lip of an 

 insect's mouth, 116 



Labrum, the upper lip of an insect's 

 mouth, 116 



Lac insect, 124 



Lacunae, interspaces between tis- 

 sues. 



Ladybird, 131 



Lameilibranchs, bivalve molluscs, 

 such as the oyster, 81 



Lampyris, the firefly, 120 



Larva, the first active stage of an 

 animal while as yet immature, 



T2I 



Leaf- roller moths, 129 



Leeches, 68 



Lepidoptera, 129 



Life, i 



Ligament, a fibrous band uniting 



two parts. 

 Ligula, part of the so-called tongue 



of an insect, 117 

 Limulus, the king crab, 103 

 Lingula, the duck-bill shell, 81 

 Lithobius, the common centipede, 



113 



Locusts, 125 

 Lug-bait, 71 

 Lymexylon, a wood-boring beetle, 



g 



TV/TACRURA, lobsters, 107 



*** Madrepores, reef - buildin 



corals, 45 

 Madreporiform plate, a rough plate 



on the surface of star-fishes, 52 

 Magosphsera, 21 

 Malacobdella, a leech, 69 

 Malpighian glands, glands in insects, 



named after their first describer, 



Malpighi, 120 

 Mandibles, the second pair of jaws 



in insects, too 

 Mantle, the leathery outer la) r er in 



molluscs, 14, 79 

 Mason spiders, in 

 Maxilla, 100 



Meandrina, brain coral, 46 

 Medusa, a jelly-fish, 40 

 Medusoids, detached portions of 



hydroids which resemble medusae, 



Meloe, 132 



Mentum, part of an insect's mouth, 



118 

 Mermis, 66 



ORT 



Mesenteries, folds of membrane GUS 

 pending the digestive sac, 43 



Metamorphoses, changes undergone 

 by an animal in its development 

 from its larval to its perfect state. 



Metazoa, animals with an internal 

 cavity, 28 



Millepedes, 114 



Mimicry in animals, 12 



Mites, 109 



Mollusca, 14, 78 



Monads, small flagellate animals, 28 



Monera, the simplest known ani- 

 mals, 21 



Monocystis, a gregarine, 23 



Morphology, the science which treats 

 of the forms of animal organisms, 7 



Moss polypes, 74 



Moths, 130 



Muscles, 4 



Mussels, 85 



Myriopoda, 98, 112 



TVFAUPLIUS, the larval stage of 



^ crustaceans, 104 



Nautilus, the most complex of 

 molluscs, 92 



Nematelmia, 64 



Nemerteans, marine worms, 60 



Nerve, 4 



Neuromuscular cells, 33 



Neuroptera, an order of insects, 127 



Noctiluca, a luminous marine ani- 

 malcule, 27 



Nucleolus, 26 



Nucleus, 21 



Nutrition, 4 



/"}CULAR plates, plates bearing 



!~ .eyes, 54 



Ocuhna, a coral, 45 



GEsophagus, the tube which conveys 

 food to the stomach, 65 



Oikosites, parasites which live with, 

 but do not feed on, their host, 120 



Operculum, the lid which closes the 

 mouth of an univalve shell, 87 



Ophiolepis, a star-fish, 51 



Ophiuroidea, star-fishes, 75 



Ophrydium, 27 



Optic nerve, the nerve which con- 

 nects the eye and the brain, 99 



Organism, an animal made up of 

 separate organs or parts, 13 



Orthoptera, an order of insects, 125 



