INDEX 



237 



N 



Natural Selection, 5 

 Nautiloids — 



Cambrian, 18 



Ordovician, 25 



Silurian, 33 



Devonian, 43 



Carboniferous, 56 



Permian, 66 



Triassic, 74 



Jurassic, 86 

 Nautilus — 



Caxboniferous, 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, 108 



Odontopteryx, 131 



Okapi, 170 



Olenellus, 19 



Oligocene Period, 140 



Olive-shells, 137 



Onchus, 2i6 



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 



Palseohatteria, 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, yy 

 Parrots, 151 

 Partridges, 132, 151 

 Patriofelis, 128 

 Pearl-oysters. See Oysters 

 Peccaries, 143, 159, 180 

 Pelecypods — 



Cambrian, 18 



Ordovician, 24 



Silurian, 32 



Devonian, 44 



Carboniferous, 55 



Permian, 66 



Triassic, 72 



Jurassic, 84 



