INDEX. 
Oceanie basins, Agassiz, L., on, i. 4. 
Kriimmel on, i. 126, 
permanence of, i. 125. 
pressure on roeks below, i. 132. 
soundings in, by ** Challenger," i. 260. 
temperature of, i. 246. 
Thomson, C. Wyville, on, i. 4. 
topography of, i. 107. 
Oceanic circulation, tradewind theory of, i. 
247. . 
Thomson’s theory of, i. 247. 
Oceanic currents, theories of, i. 247. 
in past ages, i. 128. 
slow movements of, i. 302. 
Oceanic deposits, organic ooze and red clay 
of, i. 264. 
Oceanie districts, salinity of, i. 248. 
Oceanic islands, i. 117. 
Oceanie realms, specialization of, i. 160. 
Oceanic temperature, disturbing factors of, i. 
248. 
Ocyroé cristallina, ii. 129. 
Ocyroé, Fewkes, J. W., on, ii. 129. 
Ocyroé maculata, ii. 129. 
Oersted on bathymetrical belts, i. 162. 
Old Bahama Channel, i. 2. 
Old-fashioned types in shallow water, i. 
156. 
Oólitic and breccia limestone at Loggerhead 
Key, i. 76. 
Oólitie limestone, modern, i. 286. 
Ooze adapted for preservation of animals, i. 
170. 
Ophiaetis swarming on sponges, ii. 113. 
Ophidiide, ii. 56. 
Ophidium cervinum, ii. 20. 
Ophiernus, ii. 5. 
Ophiocamax hystrix, ii. 5, 110, 111, 114. 
Ophioconis miliaria, ii. 111, 112. 
Ophioereas, ii. 5. 
Ophioereas spinulosus, ii. 109, 114. 
Ophiohelus umbella, ii. 116. 
Ophiolipus Agassizii, ii. 115, 
Ophiomastus seeundus, ii. 113. 
Ophiomitra valida, ii. 115. 
Ophiomusium Lymani, ii. 114. 
Ophiomusium planum, ii, 111, 112. 
Ophiomyces frutectosus, ii. 111, 113. 
Ophiomyxa flacéida, ii. 113. 
Ophiopwpale Goésiana, ii. 111. 
Ophiophyllum petilum, ii. 110. 
Ophiothrix, colonies of, ii. 113. 
. Ophiozona nivea, ii. 5, 110. 
Ophiura Elaps, ii. 111. 
Ophiurans, ii. 109, 
bathymetrical range of, ii. 114. 
211 
Ophiurans, known previous to ‘‘ Blake ” Ex- 
pedition, ii. 5. 
phosphorescence of, i. 199. 
Report on, by T. Lyman, i. xxi. 
Ophiuridee, Lyman on, ii. 109, 
Opisthoteuthis Agassizii, ii. 58, 
Oplophorus, ii. 47. 
Orbiculina adunca, ii. 160, 
Orbitolites, ii. 160, 161. 
Orbulina, i. 194, 
Orbulina universa, ii. 160, 167. 
Krohn on, ii. 167. 
Pourtalès on, ii. 167. 
Organie matter, at distance from shore, lim- 
ited supply of, i. 269. 
as food for deep-sea life, i. 313. 
held in suspension near shore, i. 269, 
Organs of sense, in deep-sea fishes, ii. 22. 
great development of, in embryos, i. 176. 
Organs of vision of deep-sea invertebrates, i. 
165. 
Orthagoriscus, i. 103. 
Oscillations of earth's surface, i. 126. 
Ostracods, ii, 51. 
| Ostraconotus spatulipes, ii. 42. 
Otoliths of fishes, in bottom deposits, i. 281. 
in fine muds, i. 145. 
Otter, von, i. 42, 139; ii. 142. 
Oxygen and earbonie acid in sea water, i. 297, 
| Oxygen in sea water, Dittmar on, i. 295. 
Jacobsen on, i. 295. 
Pacific and Atlantic isotherms, i. 248. 
Peelopatides confundens, ii. 88. 
Paguroidea, ii. 40. 
Palechinidee, ii. 94. 
Pal®otropus Josephine, ii. 100. 
Paleopneustes hystrix, ii. 100. 
Palinurus, i, 175. 
Pallenopsis, ii. 50. 
Panceri on phosphorescence of marine ani- 
mals, i. 198. 
Pandalus, ii. 46. 
Paraeyathus confertus, ii. 149, 150. 
Parasitic algo, Geza Entz on, i. 214. 
Parasitie fungus, P. M. Duncan on, i. 166. 
Parasitism, different kinds of, i. 215. 
Parry on deep-sea temperatures, i. 46. 
Passage of littoral to abyssal regions, ii. 7. 
Passages between Windward Islands swept 
clean, i. 236. 
Patterson, Carlile P., i. vii, 49. 
Patterson Deep, i. 106. 
| Pecten Dalli, ii. 72. 
| Pecten phrygium, ii. 72. 
' Pecten Pourtalesianum, ii. 73. 
