526 



MOLLUSCA — BRACHIOPODA 



Myacea, 4-56 



3Iyalina, 449 



Mycetopus, 307, 316, 344, 452 



3Iyochama, 458 



My odor a, 458 



Myophoria, 448 



Myopsidae, 389 



Myrina, 449 



Myristica, 4^4 



Mytilacea, 448 



3Iytilimeria, 458 



3Iytilops^ 452 



Mytilopsis, 14 



Mytilus, 258, 449 ; gill filaments, 166, 

 285 ; 31. eclulis, 14, 165 ; attached to 

 crabs, 48, 78; pierced by Purpura, 

 60 ; Bideford Bridge and, 117 ; rate 

 of growth, 258 ; stylet, 240 



3fyxostoma, 4^4 



N AC ELLA, 405 



Naiadina, 449 



Nanina, 278, 300 f., 335, 440 ; radula, 



217 232 

 Napaeus, 296-299, 316, 442 

 Naranio, 454 

 Narica^ 412 

 Nassa, 423 ; egg-capsules, 126 ; sense 



of smell, 193 

 Nassodonta, 423 

 Nassopsis, 332 

 Natica, 246, 263, 41I ; spawn, 126; 



operculum, 268 

 JSfaticopsis, 409 

 'Native' oysters, 106 

 Naiisit07'a.f 15 

 Nautiloidea, 393 

 Nautilus, 254, 392, 395 ; modified arms, 



140 ; eve, 183 ; nervous system, 206 ; 



radula; 236 ; kidneys, 242 

 Navicella, 267, 268, 324, 327, 410; 



origin, 17 

 Navicular 358, 442 

 Navicula (Diatom), cause of greening 



in oysters, 108 

 Nectoteutliis^ 389 

 Neda, 431 



Nemattirella, 12, 297 

 Nemhrotha., 434 

 Neoholus, 504 

 Neohuccinum^ 424 

 Neocyclotus, 357, 358 

 Neomenia, 8, 133, 216, 228, 404, 404 ; 



breathing organs, 154 ; nervous sys- 

 tem, 203 

 Neothauma, 332 

 Neotremata, 511 

 Neptunea, 252, 262, 423 ; egg-capsules, 



126 ; capture, 193 ; monstrosity, 251 

 Nerinea., 417 

 Nerita^ 17, 410 ; N. polita used as 



money, 97 



Neritidae, 260, 410 ; radula, 226 

 Neritina, 256, 410 ; origin, 16, 17, 21 ; 

 egg-laying, 128 ; eye, 181 ; distribu- 

 tion, 285, 291 f., 324, 327; N. fluvia- 

 tilis, habitat, 12, 25 



Neritoma, 41O 



Neritopsis^ 409 ; radula, 226 ; opercu- 

 lum, 269 

 Nervous system, 201 f. 



Nesiotis., 357, 443 



New Zealanders, use of shells, 99 



Nicida., 413 



Ninella, 409 



JViphonia, 4O8 



Niso, 422 



Nitidella, 428 



Nodidus, 415 



Notarchus, 431 



Nothns, 358, 442 



Notobranchaea, 4^8 



Notodoris, 434 



Notoplax, 403 



Novacidina, 305 



Nucula, 254, 269, 273, 447 



Nuculidae, otocyst, 197 ; foot, 201 



Nucidina, 448 



Nudibranchiata, 432 ; defined, 10 ; pro- 

 tective and warning colours, 71 f.; 

 breathing organs, 159 



Nummidina, 295 



NuUallina, 403 



Obba, 311, 315, 441 



Ohhina, 306, 311, 312, 314, 319 



Oheliscus, 442 



OboleUa, 496, 504 ; stratigraphical dis- 

 tribution, 506, 508 



Obolidae, 496, 504, 508 



Obolus, 504, 508; embryonic shell, 509 



Ocinebra, 423 



Octopodidae, hectocotylised arm, 137, 

 139, 140 



Octopus, 319-386 ; egg-capsules, 127 ; 

 vision, 184 ; radula, 236 ; crop, 238 



Ocythoe, 384 ; hectocotylus, 138 



Odontomaria, 407 



Odontostomits, 358, 442 



Odostomia, 250, 422 ; parasitic, 78 



Oesophagus, 237 



Ohola, 4S4 



Oigopsidae, 390 



Oldhamina, 506, 508 



Oleacina, habits, 55 



Oliva, 199, 255, 275, 425, 426 



Olivancillaria, 426 



Olivella, 260, 267, 426 ; 0. biplicata as 

 money, 97 



Olivia, 4O8 



Omalaxis, 413 



Omalonyx, habitat, 23 



Ommastrephes, 6, 378, 390 



Ommatophores, 180, 187 



