SUBJECT INDEX 



173 



Implications, 150 et seq. 

 Ischnochiton, 103 

 Inversion, of Grantia, 59-61 



of Volvox, 60-61 

 Invertebrate phyla, 101 

 Invertebrate phylogeny, 101 et seq. 

 Lampetia, 89 

 Lead, 137-139 

 Leacosolenia, 69 

 Life, on other planets, 17 



origin of, 8 et seq., 13 et seq. 

 Lineus, 116, 117, 119, 127 

 Lingula, 143-144 

 Limnaea, 126 

 Lohmann reaction, 114 

 Lombricine, 128 

 Lucernaria, 80 

 Lumbriconereis, 127 

 Lumbricus, 114, 122, 127, 128 

 Maia, 126 

 Marphysa, 127 

 Martasterias, 126 

 Mastigamoeba, 31, 33 

 Medusa, 79, 80, 83, 87, 96 

 Melicerta, 54 

 Mesozoa, 41, 50, 71-76, 152 



resemblances to Trematodes, 74 

 Meteorites, 16, facing 16, facing 17 

 Metaphyta, 13, 46, 47 

 Metazoa, origin of, 25, 36 et seq., 

 151-152 

 most primitive, 50 et seq., 82-84 

 Mitosis, 12 



Miracidium, 72, 74, 76 

 Monerula, 62, 63 

 Monocystis, 26, 44 

 Mouth, 68, 102-105 

 Mycetozoa, 27 

 Mytilus, 126 

 Myxicola, 126 

 Myxobolus, 43, 45 

 Muller's larva, 90, 96 

 Naegleria, 31, 44, 49 

 Natural selection, vii 

 Nematocysts, 81 

 Nematoda, 106, 129 

 Nemertini, 116, 117, 129 

 Nephthys, 126, 127 

 Nereis, 102, 116, 117, 118, 119, 120, 



122, 123, 125, 126, 127 

 Nucleic acids, 20 



Nucleoproteins, 8 

 Obelia, 78 



Octopus, 72, 117, 118 

 Oligomeria, 110 

 Opalina, 33, 46, 47 

 Ophioderma, 121 

 Ophiothrix, 126 

 Origin of, Bacteria, 22-25 

 Coelenterates, 76-84 

 life, 7, 150-151 

 Metazoa, 36 et seq. 

 Porifera, 54 

 Protozoa, 26 et seq. 

 vertebrates, 120, 124, 134 et seq. 

 viruses, 18-21 

 Origin of Phyla, 154 

 Origin of Species, 4-5, 154 

 Orgones, 15 



Orthonectidae, 72, 74-75 

 Osteichthyes, 137 

 Ostrea, 126 



Palaeontology, 134 et seq. 

 Palaeotherium, 145 

 Palmella stage, 37, 47 

 Paramecium, 26, 46 

 Pecten, 114 

 Pegmatites, 138, 139 

 Peripatus, 102, 103 

 Pheopolykrikos, 40, 44 

 Phoronidea, 107 

 Phosphagens, Protozoa, 129 

 Coelenterate, 116 

 sponges, 129 

 Platyhelminth, 112, 116 

 annelid, 112, 116, 122-123 

 cephalopod, 112 

 echinoderm, 113, 120-122 

 protochordate, 113, 123 

 vertebrate, 113, 122 

 Phosphorus, 113 et seq. 

 Physalia, 76, 79 

 Physemaria, 63, 64 

 Planaria, 116, 117, 119 

 Planocera, 102 

 Planula larva, 69, 70, 83, 87 

 Plasmodiophora, 46 

 Plas?nodium, 26, 33 

 Plasmodroma, 33 



Platyhelminthes, 50, 67, 72, 89, 94-96, 

 99-100, 106-107, 116, 129 



