400 



INDEX. 



INS 



Insects continued. 



antennae of, 193 



sense of smelling, 193 



eyes of insects, 194 



anasticatory organs, 195 



chewing and sucking insects, 196 



digestive organs, 197 



motions of insects, 198 



aquatic insects, 199 



foot of the domestic fly, 201 



tracheae, or air-vessels, and stigmata 



of insects, 202 



their wings, 203 



their defences, 205 



their vitality, 206 



their modes of feigning death, 207 



their concealments, 208 



their ravages, 215 



insects useful to man, 216 



their numberless enemies, 217, 218 



their instincts, 219 



their parental affection, 225 



their architectural skill, 225 

 Instinct of insects, 219 

 Intestinal worms, 171 



TELLY-FISHES, 125 



d ciliograde, 128 



Jerboa, or jumping-hare, its structure, 



328 

 Jungle-nails, or thorns of the Acacia to- 



mentosa, 68 



KANGAROO, its sense of smell, 352 

 its parental affection, 274 

 Kinkajo'u, prehensile tail of the, 335 



T AMELLIBRANCHIATA, 149 

 J_J Laminariae, or oar-weeds, 55 

 Lammergeier, his lofty nights, 300 

 Lamprey, dental apparatus of the, 253 



its respiratory apparatus, 260 

 Land-crabs, 183 

 Land-leeches, 170 



Laplace, his calculations of planetary 



perturbations, 4 

 Lappet-moth, the, 205 

 Lavines of the Alps, 33 

 Leaves of plants, 71 



leaves, the chief ornament of spring, 71 



uses of leaves to plants, 71 



internal growth of leaves, 72 



cuticles and pores of leaves, 73 



pliability and resisting power of 



leaves, 74 



their functions, 75 



their stems, 75 



sensibility of leaves, 75 



MAM 



Leaves continued. 



their enemies, and defences, 76 



hairs, prickles,, and secretions, 76 



harmonies between leaves and in- 



sects, 77 

 Leech, mouth and foot of the, 169 



their enemies, 170 



the land-leech, 170 

 Leucophrys patula, 108 

 Lichens, 52 



Light, composition of, 13 



the prismatic colours, 13 



the harmony between colours and the 



human mind, 14 



what is light? 15 



Limpet, strength of its sucker, 156 



its tongue, 158 



Lion, his means of defence and aggres- 

 sion, 355 



skeleton of the, 355 

 Lithophytes, 120 



social republicans, 120 



coral islands, 122 



Lizards, their means of defence, 270, 274 



toes of the gecko, 273 



tongues of lizards, 274 

 Llama, sole-pads of the, 334 

 Lobster, legs of the, 179 



its moulting process, 180 

 Lob-worms, 170 



Locusts, ravages of, 215 

 Looper-moth, caterpillar of, 207 

 Lophius piscatorius, its mode of taking 

 its prey, 263 



TVTACROCYSTIS PYKIFERA, its 

 ILL wonderful stem and roots, 55 

 Mammalia, 317 



modifications in the structure of their 



limbs, 317 



fins of the whale, walrus, and seal, 



318, 319 



wings of the bat, 32 1 



the Nycteris, 323 



flying squirrels, 324 



moles, 325 



limbs of the cervine and" bovine 



races, 326 



the elephant, 327 



the hare, 328 



the kangaroo, 329 



the sloth, 329 



monkeys, 330 



wanderoos, 331 



toes and hands of mammalia, 332 

 the cloven hoof in the cervine 



and bovine races, 333 



sole-pads of ruminants, 334 



tails of mammalians, 335 



their skin, 337 



