Laeocochlis, 154 
Lamellaria, 156 
Lamellibranchia, 205 
Lamellidoris, 178 
Lanistes, 152 
Laoma, 188 
Lasaea, 266 
Latia, 186 
Latirus, 164 
Leachia, 340 
Leda, 255 
Leiblein’s gland 93 
Leioglossa, 342 
Lepeta, 145 
Lepetella, 145 
Lepidomenia, 60 
Lepidopleurus, 53 
Lepidoteuthis, 339 
Leptochiton, 53 
Leptoconchus, 165 
Lepton, 266 
Leuconia, 184 
Ligament, 213 
Tima, 263 
Limacina, 170 
Limaea, 263 
Limapontia, 181 
Limazx, 187 
Limifossor, 63 
Limnaea, 185 
Limnocardium, 271 
Limnotrochus, 154 
Limopsis, 258 
Limopteria, 260 
Liolophura, 54 
Liiomesus, 164 
Liopistha, 278 
LTiotia, 150 
Lipocephala, 205 
Lissoceras, 335 
Lithocardium, 271 
Lithodomus, 259 
Lithoglyphus, 154 
Litiopa, 153 
Littorina, 152 
LTittorinida, 154 
Litwites, 333 
Liver, 7, 44, 95, 200, 220, 
301 
Tivona, 149 
Lobes (accessory cerebral), 
137 
Lobiancoia, 96 
Lobiger, 169 
Lobites, 335 
Loligo, 342 
Loligopsis, 340 
Loliguncula, 342 
Loliolus, 342 
Lomanotus, 176 
Lophocercus, 170 
INDEX 
Lorica, 54 
Loricella, 54 
Loxoceras, 332 
Loxonema, 154 
Lucapina, 149 
Lucapinella, 149 
Lucina, 265 
Lucinopsis, 270 
Tunulicardium, 261 
Lutetia, 266 
Lutraria, 274 
Lyonsia, 277 
Lyonsiella, 277 
Lyrodesma, 259 
Lytoceras, 335 
Macellomenia, 60 
Macgillivraya, 140 
Maclurea, 147 
Maclurites, 150 
Macoma, 268 
Macrochilus, 154 
Macrochisma, 149 
Macroscaphites, 335 
Mactra, 270 
Magilus, 165 
Malacozoa, 1 
Malletia, 256 
Malleus, 260 
Mandibles, 6, 88, 299 
Mangilia, 166 
Margarita, 149 
Marginella, 
Marionia, 175 
Marsenina, 156 
Martesia, 275 
Matheronia, 272 
Mathilda, 155 
Meekia, 265 
Megalaesthetes, 50 
Megalodon, 267 
Megaspira, 188 
Megatebennus, 149 
Meladomus, 152 
Melampus, 184 
Melania, 154 
Melanopsis, 154 
Meleagrina, 260 
Melibe, 175 
Mentum, 158 
Meretrix, 270 
Merobranch, 45 
Mesalia, 155 
Mesodesma, 270 
Mesolimax, 187 
Mesoplacophora, 53 
Metalimaz, 187 
Micraesthetes, 50 
Micromelo, 169 
Microplax, 53 
Milneria, 264 
Miratesta, 185 
Mitra, 164 
Mitrularia, 155 
Modiola, 259 
Modiolarca, 264 
Modiolaria, 259 
Modiolopsis, 259 
Modiomorpha, 259 
Modulus, 154 
Molleria, 150 
Monoceros, 165 
Monochroma, 187 
Monocondylaea, 268 
Monodonta, 149 
Monomyaria, 211 
Monopleura, 272 
Monotis, 261 
Montacuia, 265 
Mopatia, 53 
Morphoceras, 336 
Mucronalia, 158 
Mulinia, 270 
Miilleria, 268 
Miiller’s organ, 291 
Murchisonia, 147 
Murex, 164 
Mutela, 268 
Mutiella, 265 
Mya, 273 
Myacea, 273 
Myalina, 262 
Mycetopus, 268 
| Myochama, 276 
Myoconcha, 259 
Myodora, 276 
Myophoria, 259 
Myopsida, 340 
Myrina, 259 
Mysidea, 262 
Mytilacea, 259 
Mytilimeria, 277 
Mytilus, 259 
Myza, 158 
Myzomenia, 60 
Nacella, 145 
Nanina, 81 
Narica, 155 
Nassa, 164 
Nassopsis, 154 
Natica, 156 
Naticopsis, 150 
Nautiloidea, 332 
Nautilus, 333 
Navarchus, 169 
Needham’s sac, 3238 
Nematomenia, 60 
Neohyalimax, 189 
Neomenia, 60 
Neomeniomorpha, 55 
Neothauma, 152 
