INDEX. 
Middle Devonian, 134; Eocene, 287, 288, 
289; Oolites, 227; Silurian, 91. 
Miliolite Limestone, 290. 
Millepora, 230. 
Millstone Grit, 159, 161. 
Miocene period, 305; rocks of, in Britain, 
305, 306; in France, 306; in Belgium, 
307; in Switzerland, 306; in Austria, 
307; in Germany, 307; in Italy, 307; in 
India, 307; in North America, 307; life 
of, 308-323. 
Mitre-shells, 271, 293. 
Mitra, 271, 293. 
Moas of New Zealand, 346-348. 
Modiolopsis, 111; Solvensis, 88. 
Molasse, 306. 
Mole, 322, 336. 
Monkeys, 305, 331. 
Monocotyledonous plants, 262. 
Monograptus, 100, 119; priodon, 119. 
Monotis, 211. 
Monte Bolea, fishes of, 295. 
Montlivaltia, 2v9. 
Mosasauroids, 279, 280. 
Mosasaurus, 279; Camperi, 279; prin- 
ceps, 279. 
Mountain Limestone, 158, 161. 
Mud-fishes, 153, 215. 
Mud-turtles, 280. 
Mull, Miocene strata of, 306. 
Murchisonia, 111, 129, 199, 213; gracilis, 
igi 
Murex, 237, 293. 
Muschelkalk, 203, 204, 206. 
Musk-deer, 317. 
Musk-ox, 344, 345, 356. 
Musk-sheep, 356. 
Myliobatis Edwardsii, 296. 
Mylodon, 351; robustus, 352. 
Myophoria, 211; lineata, 211. 
Myriapoda of the Coal, 181, 182. 
Nassa, 293. 
Natatores, 297. 
Natica, 271, 293. : 
Nautilus, 112-114, 130, 149, 186, 199, 237, 
272, 294; Danicus, 272 ; pompilius, 237. 
Neanderthal skull, 364. 
Neocomian series, 257, 260. 
Neolimulus, 125. 
Nerinea, 237, 271; Goodhallit, 237. 
Nerita, 393. 
Neuroptera, 311. 
Neuropteris, 136, 165, 196. 
Newer Pliocene, 323, 524. 
New Red Sandstone, 193, 203. 
Newts, 189, 200, 217. 
Niagara Limestone, 117. 
Nipadites, 290; ellipticus, 290. 
Neggerathia, 197. 
Norwich Crag, 324. 
Nothosaurus, 219; mirabilis, 219. 
Notidanus, 241. 
Numenius gypsorum, 297. 
Nummulina, 172, 290; 
pristina, 172. 
Nummulitic Limestone, 24, 287, 291. 
levigata, 290; 
Oak, 262, 310. 
Obolella, 87; sagittalis, 88. 
Odd-toed Ungulates, 300, 315, 327, 353. 
Odontaspis, 275. 
Odontopteris, 165; Schlotheimni, 164. 
403 
Odontopteryx, 297 ; toliapicus, 297, 298. 
Odontornithes, 282. 
Ogygia, 108; Buchii, 107. 
Older Pliocene, 323, 324. 
Oldhamia, 81; antiqua, 82; 
Ireland, 79, 80. 
Old Red Sandstone, 133; origin of name, 
133; of Scotland, 134; relations of, to 
Devonian, 133, 134, 155. 
Olenus, 108; micrurus, 88. 
Oligocene, 395. 
Oligoporus, 178. 
Olive-shells, 293. 
Omphyma, 119. 
Onchus, 130 ; tenuistriatus, 131. 
Oneida Conglomerate, 116. 
Onychodus, 153; sigmoides, 151. 
Oolitic limestone, structure of, 28; mode 
of formation of, 30. 
Oolitie rocks (see Jurassic). 
Ooze, Atlantic, 22, 33. 
Ophidia, 251; of the Eocene, 296. 
Ophiuroidea, of the Lower Silurian, 105; 
of the Upper Silurian, 120; of the Car- 
boniferous, 177; of the Trias, 210; of 
the Jurassic, 233. 
Opossum, 299, 315. 
Orbitoides, 291. 
Oriskany Sandstone, 135. 
Ormoxylon, 138. 
Orohippus, 302. 
Orthis, 38, 109, 125, 147, 184, 199; bifurata. 
109; Davidsoni, 127; elegantula, 127 ; 
Habellutum, 109; Hicksti, 38; lenticu- 
laris, 38; plicatella, 110; resupinata, 
185; subquadrata, 109; testudinaria, 
110. 
Orthoceras, 89, 112, 113, 130, 149, 186, 
213; crebriseptum, 113. 
Orthonota, 111. 
Orthoptera, 182, 311. 
Osmeroides, 276 ; Mantelli, 276. 
Osmerus, 276. 
Osteolepis, 153. 
Ostracode Crustaceans of the Cambrian, 
83; of the Lower Silurian, 107; of the 
Upper Silurian, 123; of the Devonian, 
145; of the Carboniferous, 179; of the 
Permian, 197; of the Trias, 210; of the 
Jurassic, 233; of the Cretaceous, 267. 
Ostrea acuminata, 235; Couloni, 269; 
deltoidea, 235; distorta, 235; expansa, 
gregarea, 235; Marshvi, 235, 236. 
Otodus, 295 ; obliquus, 296. 
Otozamites, 230. 
Otozoum, 206. 
Oudenodon, 220; Bainii, 221. 
Ovibos moschatus, 356. 
Oxford Clay, 227, 229. 
Oxyrhina, 312; xiphodon, 313. 
Oysters, 235, 236, 269. 
Pachyphyllum, 173. 
Palearea, 111. 
Paleaster, 120; Ruthveni, 121. 
Palasterina, 120; primeeva, 121. 
Palechinus, 120, 178 ; ellipticus, 177. 
Palevearis, 180; typus, 180. 
Paleocoma, 120; Colvini, 121. 
Palceocoryne, 172. 
Paleolithic man, remains of, 363-365. 
Palewomanon, 118. 4 
Palceoniscus, 188, 200. 
slates of 
