INDEX 



237 



N 



Natural Selection, 5 

 Nautiloids 



Cambrian, 18 



Ordovician, 25 



Silurian, 33 



Devonian, 43 



Carboniferous, 56 



Permian, 66 



Trianic, 74 



Jurassic, 86 

 Nautilus 



Carboniferous, 56 



Permian, 66 



Triassic. 74 



Jurassic. 86 



Cretaceous, 108 



Eocene, 137 



Neander human remains, 195 

 Nebalia. 5, 19 

 Nebular Hypothesis, 7 

 Necrolemur, 149 

 Negroids, 208. 209 

 Neolithic. See Implements 

 Nesodon, 163 

 Newts, 58 

 Nilgai, 178 



Nummulites, 138, 140 

 Nuthatches, 132 



O 



Oaks, 113 



Oceans, formation of, 7 



Ocelots, 206 



Octopus, 1 08 



Odontopteryx, 131 



Okapi, 170 



Olencllus, 19 



Oligocene Period, 140 



Olive-shells, 137 



Onchus, 36 



Ophidia. See Snakes, Cobra, Python, 



Rattle-snake 



Ophiuroids. See Brittle-stars 

 Opossum. 97, 119. 140, 165, 185 

 Opossum-rat, 165 

 Orang, 179. 215 

 Ordovician Period, 21 

 Oreopithecus, 155 



Orohippus, 121 

 Orthoceras annulatum, 33 

 Osprey, 132 

 Ostracoderms, 35, 38 

 Ostracods 



Cambrian, 19 



Ordovician, 26 



Silurian, '35 



Devonian, 43 

 Ostriches, 179 

 Otters, 147, 156 

 Oudenodon, 63 

 Ovibos. See Musk-oxen 

 Owls, 132, 151 

 Oxen, 178, 183 

 domesticated, 212, 213 

 Oysters 



Devonian, 44 



Carboniferous, 55 



Triassic, 73 



Jurassic, 84 



Cretaceous, 108 



Edible, 55, 85 



Pearl. 32, 55, 66, 85 



Saddle, 44 



Thorny, 73, 84 



Pakcohatteria, 62 

 Palaeolithic. See Implements 

 Palaeomastodon, 125 

 Palaeostraca. See King-crabs Sea- 

 scorpions, Trilobites 

 Palaeotheres, 122, 140, 157 

 Palms, 114 



Panama, Isthmus of, 181 

 Paradoxides, 19 

 Pareiasaurus, 62, 77 

 Parrots, 151 

 Partridges, 132, 151 

 Patriofelis, 128 

 Pearl-oysters. See Oysters 

 Peccaries. 143, 159, 180 

 Pelecypods 



Cambrian, is 



Ordovician, 24 



Silurian, 32 



Devonian, 44 



Carboniferous, 55 



Permian, 66 



Triassic, 72 



Jurassic, 84 



