612 



GOMPA RA TI VE A NA TOMY 



Megistocrinus, 307 



Melampas, 109 



Melanidce, 6 



Meleagrina, 17 



,, margaritifera, 17 



Melibe, 13 



Mellita, 293 



,, testudinata, 293 



Melocrinidce, 307 



Melocrinus, 307 



typus, 307 



Melonites, 289 



,, muftipora, apical system, 340 



Melonitidce, 289 



Membrana limitans, 173 



Meona ventricosa, apical system, 323 



Meretrix (Cytherea), 18 



Meridosternal test, 349 



Mesites, 313 ; ambulacrum, section, 386 



Mesoblastus, 315 



Mesodesmatidce, 18 



Mesoplax, 64 



Mesorchium, 230 



Metablastus, 315 



Metacrinus, 313 



angulatus, tegmeu calycis, 365 



Murrayi, 311 



Metaplax, 64 



Metapodium, 106 

 Metrodira, 298 

 Micraesthetes, 166 

 Micraster, 293 



,, coranguinum, apical system, 324 

 Millericrinus, 310 

 Milneria, 49 

 Mimaster, 296 

 Mithrodia, 299 

 Mitra, 101 

 Mitridoe, 6 

 Modiola, 15 

 Modiolaria, 15 

 Moira, 503 



Mollusc, hypothetical primitive, 26 

 Molpadia, 287 



chilensis, 488 

 Molpadiidce, 287 

 Monocyclic base (Crin.), 328 

 Monocyclica, 303 

 Monogonopora, 8 

 Monomyaria, 14, 124 ; shell, 64 

 Monopleuridce, 18 



Monotocardia, 5 ; diagram, 31 ; gills, 90 

 Montacuta, 93 

 Muelkria (Moll.), 124 

 Muelleriacea, 124 

 Mueller idee, 124 

 Mulleria (Echin.), 285 

 Murex, 101 



trunculus, alimentary canal, 189 

 Muricidce, 6 

 Mutela, 17 

 Mutelince, 51 

 Mya, 19 



Myacea, 18 

 Myadce, 64 

 Myiidce, 19 

 Myochama, 51 

 Myopsidce, 24 

 Afyriotrochus, 288 



7i //////. 246 



Mytilida 1 , 15 

 Mytilus editliti, 15 

 Myxaster, 298 



NACELLA, 108 

 Nacreous layer of shell, 57 

 Narica, 108 

 .\/iricid(K, 107 

 Natantia, 10 



Xnfica Joseph in< i, 107 ; swelling of foot, 

 119 



.' .' 

 Nautilus, 22', eye, 169; diagram, 37; 



gonads, 230 ; nervous system, 



145, 146 ; pallial complex, 



82 ; tentacles, 117 

 riinijiiliiix, 22 

 Xniitiltix group, 68 

 Nectria, 296 



Needham's (spermatophoral) pouch, 238 

 Nieooririoidea, 303 

 Neomenia, 3 



Neomeniina, 3 

 Nephropneusta, 78 

 Neptunea contraria, 160 

 Neritacea, 4 

 Neritidce, 5 

 Neritince, 5 

 Neritopsuhi . ', 

 Notaeum, 10 

 , 10 

 punctatux, nervous system, 141 



10 

 Xotnbranchcea, 90 



Xntuhi-finrliii i'/" . 11 



Nuchal plate, 126 

 Nudeoblastidce, 315 



Nucida, 14 ; ctenidia, 85 



., nucleus, 14 

 Nuculidce, 14 

 Nudibranchia, 12 



OCTOPODA, 24 



Octopodidce, 24 



Octopus, 24 ; anatomy, 147 ; nervous 



system, 148 

 ,, i-nli/tirif<,25; gonad, female, 231 : 



male, 239 



Ocular plates (Echinoid,), 321 ; (Ast.) 354 

 Odontoblasts, 183 

 Odontophore, 336 

 Oigopsidce, 24 

 Oligopygus, 293 

 Oliva, 30 



