_Labrodon_, 271 LABYRINTHODONTIA, 272 _Lagena_, 98 _?Lagria_, 250 _Lamna_, 267, 269, 271 Lamp-shells, 57, 158 _Lasiocladia_, 110 _Lasiograptus_, 126, 127 _Latirus_, 198, 201 _Laurus_, 91 _Leaia_, 233 Leda, 182, 184, 185, 187, 188 Leonardo da Vinci, 25 _Lepas_, 243 _Leperditella_, 234 _Leperditia_, 233, 234, 235, 237, 238 _Lepidocyclina_, 99, 100 " limestone, 73 _Lepidodendron_, 40, 85, 261 " beds, 162 _Lepralia_, 157, 158 _Leptaena_, 162, 164 _Leptoclinum_, 257, 258 _Leptodesma_, 179 _Leptodomus_, 177 _Leptograptus_, 124 _Leptolepis_, 264, 265, 267 _Lepton_, 187 _Lichas_, 229 _Lichenopora_, 158 _Lieberkuehnia_, 95 _Lima_, 184, 185, 186 _Limatula_, 185 Limestones formed by organisms, 72 _Limnaea_, 69 _Limopsis_, 184, 185, 187 _Limulus_, 248 _Lingula_, 160, 162, 166, 261 _Linthia_, 147, 148 _Liopyrga_, 201 _Liotia_, 198, 200 Lithistid sponges, 109, 110 Lithological evidence, value of, 44 _Lithophaps_, 283 _Lithothamnion_, 75 _Lituites_, 207 _Lituola_, 97 _Loganograptus_, 126 _Lophophyllum_, 117 _Lorica_, 190 _Lotorium_, 198, 200, 202 _Lovenia_, 147 Lower Cambrian trilobites, 226 " Cretaceous bivalves, 183 " " brachiopods, 166 " " cephalopods, 209 " " crab, 246 " " dragon-fly, 250 " " fishes, 267 " " reptiles, 277 " Mesozoic fishes, 263 " Ordovician graptolites, New Zealand, 126 " Ordovician graptolites, Victoria, 124 _Loxoconcha_, 239 _Loxonema_, 193, 194, 195, 196 _Lucina_, 185, 187 Lung-fish, 265 _Lunucammina_, 98 _Lunulicardium_, 178 _Lunulites_, 158 _Lyriopecten_, 179