332 



INDEX OF NAMES 



Modiolaria, commensal, 135 



locomotion, 173 

 Molgula, habitat, 57 

 Mollusca, armour, 100 



adductor muscles, 109-10 



nervous system, 227-8 



reproduction, 270 

 Monodonta crassa, habitat, 49-51 

 Monstrilla helgolandica, parasitic, 



134 

 Motella mustela, spawning, 280 

 Munida rugosa, respiration, 214 

 Murex, defensive adaptation, iii 



respiration, 209 



spawn, 249 



dye-yield, 287 

 Mya, spp., habitat, 57 



as prey, 58 



eye, 229 



economic aspect, 287, 291 

 Myriapoda, 311 

 Mysis stage, 267, 269 

 Mysis vulgaris, habitat, 56 

 Mytilus edulis, habitat, 49, 56-7 



salinity conditions, 81 



epizoic, 134 



commensal, 136 



parasitised, 144, sqq. 



locomotion, 158, 176 



larvae, 248 



reproduction, 270 



economic aspect, 284, sqq. 



bait, 289 

 Myxicola, tube, 102 



Nassa, spp., burrowing, 73 



defensive adaptation, no, 112 



feeding, 195 



reproduction, 270, 272 

 Natica, spp., burrowing, 73 



feeding, 195 



reproduction, 270, 272-3 

 Nauplius stage, 267-8 

 Nebalia bipes, habitat, 49 

 Nematoda, parasites, 141-2, 149 

 Nemertea, feeding, iqi 

 Nereilepas fucata, commensal, 135, 



136 

 Nereis, spp., habitat, 49 



resistance to desiccation, 64 



feeding, 192 



nervous system, 224-5 



reaction to contact, 236 



reproduction, 263, 264-5 



bait, 289 

 Neritina, spp., death-feigning, 94 



reproduction, 270 



Nicomachia, tube, 102 

 Nudibranchiata, spp., protective 

 resemblance, 96 



locomotion, 164, 172 



spawn, 246, 274 



reproduction, 271, sqq., 279 



Obelia, reproduction, 261 

 Octopus, temperature range, 76 



commensal, 135 



feeding, 193 

 Ocypoda arenaria, respiration, 208-9 



development, 270 

 Odostomia rissoides, parasitic, 133 

 Olivella biplicata, uses of, 301 

 Onus mustela, feeding, 196 

 Ophelia, spp., reproduction, 263, 



266 J 



Ophioactis virens, autotomy, 125 ^ 



Ophiocoma, spp., autotomy and 



regeneration, 125 

 Ophiodenyia, autotomy, 125 « 



Ophioglypha, 57, autotomy, 125 ■ 



Ophiomyxa, autotomy, 125 » 



Orchestia, habitat, 49 



locomotion, 171 

 Oscarella, adaptive form, 70 



reproduction, 258 

 Ostrcea edulis, salinity conditions, 81 



spawning, 276 



economic aspect, 284, sqq. 



Pachydesma crassatelloides , uses of, ' 



301 

 Pachymatisma, contractility, 219 

 Palesmon, growth, 270 



reaction to light, 234 

 Palinurus, spp., reproduction, 269 

 Paludestrina stagnalis, habitat, 51 



resistance to desiccation, 63 

 Pandalus montagui, economic aspect, 



288 

 Parthenope, spp., protective resem- 

 blance, 95 

 Patella, spp., habitat, 49 



power of adhesion, 67 



adaptive form, 70-1 



salinity conditions, 81 



migration, 176-7 



reproduction, 270 



economic aspect, 287 



in polluted water, 300 

 Pecten, spp., habitat, 49 



salinity conditions, 81 



defensive adaptation, in 



locomotion, 165 



eye, 229 



