526 



MOLLUSCA — BRACHIOPODA 



Mycetoijus, 307, 316, 344, 45-2 



Myochavia, 458 



My odor a, 458 



Myophoria, 44^ 



Myopsidae, 389 



Myrina, 44^ 



Myristica, 4^4 



Mytilacea, 448 



Mytilimeria, 458 



Mytilops, 452 



Mytilopsis, 14 



Mytilus, 258, 449 ; gill filaments, 166, 



285 ; M. edulis, 14, 165 ; attached to 



crabs, 48, 78 ; pierced by Purpura, 60 ; 



Bideford Bridge and, 117 ; rate of 



growth, 258 ; stylet, 240 

 Myxostoma, 414 



N AC ELLA, 405 



Naiadina, 449 



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



217, 232 

 Napaeus, 296-299, 316, 442 

 Naranio, 454 

 Narica, 41^ 

 Nassa, 4^3 ; egg-capsules, 126 ; sense of 



smell, 193 

 Nassodonta, 4'23 

 Nassop)sis, 332 

 Natica, 246, 263, 411 ; spawn, 126 ; 



operculum, 268 

 Naticopsis, 409 

 ' Native ' oysters, 106 

 Xausitora, 15 

 Nautiloidea, 393 

 Nautdus, 254, 392, 395 ; modified arms, 



140 ; eye, 183 ; nervous system, 206 ; 



radula, 236 ; kidneys, 242 

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



origin, 17 

 Navicula, 358, 4-^ 

 Navicula (Diatom), cause of greening in 



oysters, 108 

 Nectoteuthis, 389 

 Neda, 431 



Nematurella, 12, 297 

 Nembrotim, 434 

 Neobolus, 504 

 Neobuccinum, 4^4 

 Neocydotus, 357, 358 

 Nmmenia, 8, 133, 216, 228, 404, 404; 



breathing organs, 154 ; nei-vous system, 



203 

 Neothauma, 332 

 Neotremata, 511 

 Neptunea, 252, 262, 433 ; egg-capsules, 



126 ; capture, 193 ; monstrosity, 251 

 Nerinea, 417 

 Nerita, 17, 410 ', N. pjolita used as money, 



97 

 Neritidae, 260, 410 ; radula, 226 

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



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

 285, 291 f., 324, 327 ; N. Jluviatilis, 

 habitat, 12, 25 



Xeritoma, 410 



Neritopsis, 409 ; radula, 226 ; operculum, 

 269 



Nervous system, 201 f. 



Nesiotis, 357, 442 



New Zealanders, use of shells, 99 



Nicida, 413 



Ninella, 409 



Niphonia, 408 



Niso, 422 



Nitiddla, 423 



Nodulus, 415 



Notarchus, 431 



Nothus, 358, 442 



Notobranchaea, 438 



Notodoris, 434 



N'otopkix, 403 



Novacidina, 305 



Nucula, 254, 269, 273, 447 



Nuculidae, otocyst, 197 ; foot, 201 



Nuculina, 448 



Nudibranchiata, 432 ; defined, 10 ; pro- 

 tective and warning colours, 71 f . ; 

 breathing organs, 159 



Xummulina, 295 



XuttaUina, 403 



Obba, 311, 315, 441 



Obbina, 306, 311, 312, 314, 319 



Obellscus, 44^ 



Obolella, 496, 504 ', stratigrajihical distri- 

 bution, 506, 508 



Obolidae, 496, 504, 508 



Obolns, 504, 508 ; embryonic shell, 509 



Ocinebra, 423 



Octopodidae, hectocotylised arm, 137, 139, 

 140 



Octojms, 379 - 3S6 ; egg - capsules, 127 ; 

 vision, 184 ; radula, 236 ; crop, 238 



Ocythoe, 384 ; hectocotylus, 138 



Odontomaria, 407 



Odonfosfmnvs, 358, 442 



Odostomia, 250, 4~3 > parasitic, 78 



Oesophagus, 237 



Ohola, 434 



Oigopsidae, 390 



Oldhamina, 506, 508 



Oleacina, habits, 55 



Olira, 199, 255, 275, 425, 426 



OUvunriUaria, 426 



Olirella, 260, 267, 426 ; 0. bip>ncata as 

 money, 97 



Olivia, 4O8 



Omalaxis, 413 



Omalonyx, habitat, 23 



Ommastrephes, 6, 378, 390 



Ommatophores, 180, 187 



Omphalotrojns, 306, 309, 316, 324, 327, 

 338, 414 



