618 
Northampton Beds, ] 65 ; Attenuation of, 
179, 397, 407, 409 ; Local Sub-divisions 
of the, 180. 
Sand, 1 65 ; General account of, 
166; Fossils of the, 167. 
of Oxfordshire, 146, 147, 156, 
158. 
, Beds resembling, 142. 
, Building - stone of, 475 ; 
Economic uses of, 486 ; Soil of, 466 ; 
Stone-tiles of, 482 ; Water-supply from 
the, 194, 504. 
Northamptonshire, Cornbrash of, 452 ; 
Forest Marble of, 379 ; Great Oolite 
Series of, 385, 397 ; Inferior Oolite 
Series of, 165, 175, 179, &c. 
Iron-ore, General account of, 494 ; 
see also 163, 166, 178-192, 193, 195, 
198, 199, 203, 207, 214, 215, 217-219, 
496 ; Analyses of, 495, 497 ; Fossils 
from the, 166, 181 ; Microscopical 
characters of, 495 ; Origin of, 12 ; 
Production of, 494, 497; Thickness 
of the, 180. 
Lime, 170. 
Northleach, 144, 148, 299, 461,507, 509, 
512. 
Northwick Hill Farm, 141. 
Norton Brize, 371, 372, 445, 480. 
St. Philip, 240, 254, 258, 260, 350, 
440. 
NORWOOD, REV. T. W., 136, 517. 
Notgrove, 115, 117, 130, 133, 246, 292, 
294, 489, 510. 
Freestone (or Oolite), Introduction 
of term, 132 ; see also 124, 129, 136. 
Nottingham, University College, 477. 
Hill, 113. 
Nuclei of Oolitic Grains, 10, 15, 19, 20 ; 
of Pisolites, 15. 
Nucleolites. See Echinobrissus. 
Nuuney, 90, 239, 499. 
Nursery Quarry, 183. 
Nuts, Fossil, 403 . 
Nutfield, 490, 491. 
o. 
Oakham, Chipping Norton, 328. 
Oakley, Great, 405, 407, 492. 
Little, 173, 407. 
Park, 281, 363. 
Oakridge Common, 281. 
Oborne, 49, 76, 79-83. 
Ochre, 92, 499. 
"Ochre Beds," 72. 
Odcombe, 72. 
Odd Down, 240, 243, 266, 478, 489, 
Oddington, 296, 377. 
(Ecotraustes. See Ammonites. 
Old, 187, 512. 
Old Head Wood, 191. 
Old Bed Sandstone, 360, 361. 
OldSodbury, 102. 
Stratford, 391. 
Oldford, 89, "92, 229. 
Oligoclase, 10. 
Olney, 179, 393, 394, 396, 451, 452, 
462, 480. 
OMALITTS D' HALLOY, J. J. D', 228. 
Oolite, Origin of term, 1. 
in connection with Calcareous 
Springs and Lakes, 19, 20. 
Grains, 6-12; Aggregations of, 
226 ; Derived, 259 ; Nuclei of, 10 ; 
Organic Fragments in, 10 ; Origin of, 
9, 11, 19; Recent formation of, 19, 
20 ; Rocks containing, 7, 8, 14. 
Marl, 110, 114, 115. 
, Microscopic sections of, 27. 
, Origin of. 16 ; Silicified, 10. 
Oolites, Upper, Middle, and Lower, 5. 
Oolitic Eocks, 6 ; Ironstone, 7, 8, 10, 
12, 494-496 ; Detrital Material in, 10 ; 
Lustre-mottling in, 11. 
Limestones, Recent, 17. 
Rocks, Stratigraphical characters 
of, 14. 
Rubble, 462. 
Series, General account of, 1 ; 
Fossils of the, 21, 24; Sub-divisions 
of the, 4 ; Thickness of, 2 ; Coral- 
beds in the, 18 ; Former Extent of 
the, 3 ; Sedimentry changes in the, 2, 
31 ; Underground Extent of the, 3. 
and Cretaceous Strata, Rela- 
tions of, 3. 
and Lias, Relations of, 3, 31, 
39, 75. 
Oolithes bathonicae, 285 ; sphcericus, 313. 
Opalinus-\>e&s, 40. 
Opalinusthone, 39. 
Ophiurella, 411. 
Ophiuroidea, 590. 
OPPEL, DH. A., 39, 49, 56, 58, 104, 254, 
340. 
Oppelia. See Ammonites. 
Orchards, 467. 
Orchardleigh Park, 92, 468, 511. 
Organic Fragments in Recent Lime- 
stones, 16; in Oolite, 10. 
Remains, 21, 35, 230, 250, 338, 
432. 
Ornithosaurians, 315, 325, 519. 
Orton. See Overton. 
Osbournby, 426, 505. 
Osmington Oolite, 15. 
Ostracoda, 232, 243 ; List of, 583. 
Ostrea acuminata, 231 (fig.), 328. 
flabelloides, 453, 454. 
Sowerbyi, 339 (fig.). 
subrugulosa, 384, 385 (fig.). 
Os^rea-beds. See Oyster-beds. 
Ostrea, Successive species of, 24. 
Otley hill, 155, 157. 
Oundle, Cornbrash of, 452-454 ; Great 
Oolite of, 410-412, 481, 487 ; Great 
Oolite Clay near, 385 ; Inferior Oolite 
of, 180, 184 ; Ironstone and Slag near, 
493, 499 ; Springs at, 502, 511, 513. 
Ouse, River, 393, 394, 451. 
Outliers of Upper Estuarine Series, 381. 
Oven-stone, 475. 
Over Kiddington, 324. 
Overbury, 138. 
