234 



INDEX 



Muller, Fritz, on mimicry, 139 

 Miiller, Hermann, on. fertilisation 



of orchids, 147, 216 

 Mylodon, 207 

 Myrmecobius, 74 



Natural Selection, 36 



compared with artificial selec- 

 tion, 51 

 '' Naturalists' Voyage," 208 

 Nauplius larva, of barnacle, 82 



of prawn, 81 



of Sacculina, 83 

 Nautilus, 58, 91, 158, 171 

 Newt, 167 

 Numbers, rapid increase of, 38 



total stationary, 41 



Objections to Darwinian theory, 



151 

 Octopus, protective colour in, 124 

 Opossum, fossils of, 56 



geographical distribution of, 75 

 Orange-tip butterfly, epigamic 



coloration in, 141 

 Orbitolites, shell of, 91, 92 

 Orchis mascula, structure and 



mode of cross-fertilisation in, 



144, 146 

 Organs, earliest commencement 



of, 164 

 " Origin of Species," 209, 214 

 Ornithorhynchus, 183 • 

 Orohippus, 67 

 Oyster, number of eggs laid by, 



39 



Palaeontology, 53 

 Palaeozoic period, 57 

 Paludina, fossil forms of, 67 

 Pandorina, 113 

 Papilio merope, 139 

 Parasites, degeneration in, 83, 84, 



g6, 160 

 Paris controversy, 14 



Parrots, changes of colour in, 121 



Passenger pigeons, 40 



Patella, eye of, 107 

 shell of, 90 



Peacock, epigamic coloration of, 

 141 



Pelvic girdle of birds and rep- 

 tiles, 180 



Peneroplis, shell of, 92 



Peneus, development of, 81 



Perissodactyla, 64 



Peroneus tertius muscle, 195 



Persistent types, 58, 157 



Phalanger, geographical distri- 

 bution of, 74 



Pheasant, epigamic coloration of, 

 141 



Phenacodus, 64 



Phrynocephalus mystaceus, 132 



Phy Ilium, 129 



Pigeon, blue-rock, 29 



Pigeons, domestic varieties of, 28 

 crossing of, 30 



Pisces, 175 



Platypus, 186 



Platysma muscle, 194 



Pleuronectes, 86 



Plesiosaurus, 57, 69, 177 



Pluteus larva, 102 



Polar bear, colour of, 123 



Polish fowl, 35 



Pnrifera, fossils of, 60 



Portunus, development of, 90 



Poultry, domestic varieties of, 34 

 epigamic coloration in, 141 



Pouter pigeon, 28 



". Power of movement in plants," 

 219 



Prawn, development of, 81 



Primary period, 57 



Primula, dimorphic forms of, 217 



Procervulus, 94 



Proechidna, 184 



Protective resemblances, 122, 123, 

 136 



