385 



Leptocliscus, 37 

 Leptomonas, 33 

 Leptycliaster, 158 

 Leskiinae, 173 

 Lcucones, ()3 

 Lisula, l'.»8 

 Lima, L'fil 

 Limaciclae, 317 

 Lhnaciiia, 359 

 LimaciiUK. 311) 

 Limnciiiiila!, 358 

 Liiiiax, 305, 31'J 

 Limicohc, '^^-i 

 Limna'a, 3U7 

 Linuiaikla.', '007 

 Liiiiiiseina;, 307 

 Limpets, 321, 345 



,, Clip and saucer, 315 

 „ fresli water, 308 

 „ key-hole, 320 

 ,, slipper, 345 

 Linckia, 13.) 

 LinckiadiE, 159 

 Liiieri^es, 93 

 Liiiiiiial riljbon, 283 

 Linkula, 246 

 Liiigulella, 24G 

 LingiilidiE, 24G 

 Lipocepliala, 252 

 Lip, 287 

 LitliistiiiiB, G9 

 Lithodomus, 267 

 Littorina, 338 

 Littorinida?, 338 

 Liver tlukc, 191 

 Lizzia, S3 

 Lobosa, 5 

 Locomotion, xix 

 Loliginidfe, 374 



Loligo, 374 

 Loligopsids, 375 



Loligopsis, 375 



Loliolus, 374 



Lopliomonas, 34 



Lopliophore, 237 



Lopliopiis, 244 



Lottia, 321 



Lovenia, 174 



Loveii's larva, 219 



Loxosoma, 240 



Luceriiaria, 94 



LucernaridiE, 94 



Liioiiia, 274 



Liiciiiida?, 274 



Liig-worin, 227 



Luidia, l.jS 



Lumbriciilus, 224 



Liiinbricus, 220 



Liinatia, 34G 



Lungs, xxiv 



Luponia, 349 



Lymphatics, xxiii 



Lyousia, 282 



Macoma, 280 

 Macrocyclis, 312 

 Macrostomum, 234 

 Mactrida;, 278 

 Madrepora, 117 

 Madreporic body, 135 

 Magilus, 335 

 Malacobdella, 235 

 Maldauidie, 226 

 Malleus, 265 

 Malpigian vessels, xx 

 Mamma, .346 

 Mantijamkia, 227 

 Manicina, 120 

 Mangelia, 337 

 Mantle, 249 



Maretia, 174 

 Margarita, :)22 

 Margaritaiui, 271 

 Margiiiellii, 327 

 Martesia, 286 

 Maryiia, 40 

 Mason shell, 326 

 Mastigocerca, 205 

 Mastigaiuii'ba, 27, 32 

 INhisligiiteulhis, 375 

 MaUinUiuii of egg, xlv 

 Meaudrina. 119 

 Meconidium, 85 

 Mediaster, 159 

 Medusa, 78 

 Melainpus, 303 

 Melauia, 341 

 Melaiiiida;, 341 

 Melaniiua;, 341 

 Melaiitho, 340 

 Jloleagriiia, 262 

 Meliccrta, 204 

 Jlellita, 172 

 Melita;a, 123 

 INIelo. 327 



Menibraiiipora, 242 

 Mental characteristics, xxxi 

 Mcnnis, 212 

 Mci-mithidae, 212 

 Jleroii, 277 

 Meseiiteron, xi 

 Mesoblast, xi 

 Mesoderm, xi 

 Mesopodium, 249 

 JVlesostomum, 190 

 Metamorphosis, xlvi 

 Metapodium, 249 

 Metazoa, 49 

 Metridium, 113, 116 

 MicrostomidiE, 191 

 Microciona, 66 

 Mycrophyle, xlv 

 Mlllepora, 89 



Millepore corals, 88 



Miliola, 21 



Mind, xxxi 



Mitra, 329 



Mitridae, 329 



Mnemiopsis, 110 



Modiolus, 266 



MoUusca, 248 



„ bivilve, 252 



,, naked, 295 



,, wing footed, 356 



Molluscoidea, 236 



Molpadia, 180 



Monactinellinae, 66 



Monadidfe, 32 



Monas, 33 



Moner, 3 



Monera, 2 



Monocaulis, 81 



Monocerca, 205 



Monocystidea, 24, 25 



Monod'onta, 323 



Monomastiga, 32 



Mononiyaria, 257 



Monosiga, '.iS 



Monoxenia, 113 



Montacuta, 279 



Montagua, 299 



Mopsea, 123 



Moriiteuthis, 375 



Morphology, ii 



Morula, ix 



Mouth, 287 



Mulinia, 279 



Mulleria, 182 



Murex, 330 



Muricidie, 330 



Muricinns, 330 

 Muscular tissue, xiii 

 Mussa. 120 

 Mussels, 264 



fresh water, 2C9 

 Mutton fish, 93 

 Mya, 2,S0 

 Mycedium, 117 

 Myidffi, 2K0 

 Myriotrochus, 179 

 Myriozoidoe, 242 

 Myriozoum, 242 

 Mytilidie, 26(i 

 Myxobranchea, 9 

 Myxospongiie, 63 

 Myzostoma, 231 



Naiadas, 269 



Maida', 223 



Nais, 223 



Naked molluscs, 295 



Nassa. 333 



Natica, 346 



Natural History, i 



Natural selection, liii 



Nautilida;, 368 



Nautilus, 104, 368 



Navicella, 323 



Nectooalyx, 99 



Nectostem, 99 



Nematoda, 207 



Nematogciis, 197 



Nemertea, 215 



Nemertes, 21<i 



Neo-Lamarckianism, Ivi 



Neomenia, 292 



Neomenoidea, 292 



Nephelis, 234 



Nephridia, 251 



Nepthyda;, 228 



Neptunea, 331 



Nereidas, 228 



Nereis, 228 



Nerincea, 342 



Nerita, 323 



Neritida;, 323 



Neritina, 323 



Nervous tissue, xiii 



Nerves, xxiv 



Neverita, 346 



New England sea-urchin, 169 



Nidorellia, 159 



Noah's ark, 2(i8 



Noctiluca, 25, 30, 37 



NoctilucidEB, 37 



Nonionina, 16, 20 



Noteus, 205 



Notoinmata, 205 



Nuculida;, 269 



Nuda, 111 



Nudibranchiata, 295 



Nuclear vescicle, 8 



Nucleolus, viii, xlv 



Nucleus, viii, xlv 



Nucula, 269 



Niiminulina, 17 



Obelia, 83 

 Obolus, 246 

 Octopoda, 3fi9 

 OctopodidiB, 370 

 Octopus, 370 

 Ocyroii, 109 

 Odontophore, 288 

 Odostomia, 342 

 Esophageal ring, xxvi 

 (Esophagus, XX 

 Oleacinidse, 310 

 Oligochajta, 220 

 Oligotroohus, 180 



