274 



IN VERTEBRA TE ZOOLOGY 



Metamorphosis, 236 

 Metanauplius, 207, 211 

 Metanemertini, 12G 

 Metanephridial sj'stem, 74, 155 

 Metathorax, 241 

 Metazoa, 20, 59 

 Metazoan tendencies, 21 

 Metridium, 103 

 Miastor, primordial cells in, 11 



paedogenesis in, 17 

 Michaelsen, 154 

 Microconjugant, 51 

 Microcotyle, 113, 125 

 Microdon, 143 

 Microdrili, 153, 157 

 Microgametes, 10, 21 

 Microgametoblast, 45 

 Micronucleus, 49, 50 

 Microporella, 160 

 Microscolex, 153 

 Microsporidia, 47 

 Microstomum, 125 

 Middle piece, 14 

 Miescher's corpuscles, 49 

 Millepora, 94, 102 

 Milliped, 233 

 Miracidium, 115 

 Mites, 225, 226, 228 

 Mitochondria, 50 

 Mnemiopsis, 103 

 Modiola, 201 

 Moina, 222 

 Mollusca, 184, 200 

 Molluscan cross, 15 

 Molluscoidea, 159, 164 

 Molting, 204 

 Monads, 34 

 Monas, 56 

 Monaxonida, 87 

 MoniHformis, 136 

 MoniUgaster, 153, 157 

 Monocystis, 57 

 Monoecious, 75 

 Monogenea, 112, 125 

 Monogenetic trematodes, 112 

 Monogononta, 143 

 Monopisthocotylea, 113, 125 

 Monostomata, 126 

 Monostomes, 113 



Monostyla, 143 

 Monothalmia, 42 

 Mouth parts of insects, 238 

 Miiller's larva, 106 

 Murex, 196, 201 

 Muscle tissue, 65, 66 

 Mussels, 186, 190 

 My a, 201 

 Mycetozoa, 40, 57 

 Myofibrils, 65 

 Myonemes, 44, 50 

 Myriapods, 232 

 Myrientomata, 205, 232, 234 

 Myrosyringata, 136 

 Mysididae, 217 

 Mysis, 208, 217, 220, 223 

 Mytilus, 187, 201 

 Myxamoeba, 42 

 Myxicola, 152, 157 

 Myxidium, 48, 57 

 Myxobolus, 48, 57 

 Myxoflagellate, 42 

 Myxopodia, 38 

 Myxospongia, 87 

 Myxosporidia, 47 



N 



Nacre, 187 



Naididae, 152 



Nais, 157 



Narcomedusae, 102 



Natica, 196, 201 



Nauplius, 207, 211 



Nautilus, 197, 199 



Navanax, 201 



Nebaha, 217, 223 



Necator, 132, 136 



Nectocalyces, 93 



Negri bodies, 55 



Nemas, 128 



Nemathelminthes, 128, 136, 257 



Nematocysts, 88 



Nematoda, 128, 136 



Nemertinea, 122, 126 



Nemertine theory, 265 



Nemertines, 122 



Neoechinorhynchus, 136 



Neomenia, 201 



