INDEX. 



211 



Oceanic basins, Agassiz, L., on, i. 4. 



Krilmiuel on, i. 120. 



l>rrm;mence of, i. 1 '_'">. 



pressure OH rocks below, i. 132. 



soundings in, by "Challenger," i. '200. 



temperature of, i. -4(1. 



Thomson, C. Wyville, on, i. 4. 



topography of, i. 107. 



( Icranic circulation, tradewiud theory of, i. 

 247. 



Thomson's theory of, i. 247. 

 Oceanic currents, theories of, i. 247. 



in past ages, i. 12S. 



slow movements of, i. -'!02. 

 Oceanic deposits, organic ooze and red clay 



of, i. 204. 



( Ircanic districts, salinity of, i. 24!S. 

 Oceanic islands, i. 117. 

 ( Wanic realms, specialization of, i. 160. 

 Oceanic temperature, disturbing factors of, i. 



i'4s. 



Ocyroe cristallina, ii. I2H. 

 Ocyroe, Fewkes, J. W. , on, ii. 129. 

 Ocyroe maculata, ii. 12'.'. 

 Oersted on bathymetrical belts, i. 162. 

 Old Bahama Channel, i. 2. 

 Old-fashioned types in shallow water, i. 



166. 

 Oolitic and breccia limestone at Loggerhead 



Key, i. Hi. 



Oolitic limestone, modern, i. 286. 

 Ooze adapted for preservation of animals, i. 



170. 



Ophiactis swarming on sponges, ii. 113. 

 Ophidiid*, ii. ">(i. 

 Ophidium cervinum, ii. 2(5. 

 Ophiernus, ii. 5. 



( )phiocamax hystrix, ii. 5, 110, 111, 114. 

 ( (phioconis miliaria, ii. Ill, 112. 

 Ophiocreas, ii. 5. 



Ophiocreas spinulosus, ii. 109, 114. 

 Ophiohelus umbella, ii. 116. 

 Ophiolipus Agassizii, ii. 115. 

 Ophiomastus secundus, ii. 113. 

 Ophiomitra valida, ii. 115. 

 Ophiomusium Lymani, ii. 114. 

 Ophiomusium planum, ii. Ill, 112. 

 Ophiomyces frutectosus, ii. Ill, 113. 

 Ophiomyxa flaccida, ii. 113. 

 Ophiopsepale Goesiana, ii. 111. 

 Ophiophyllum pctilum, ii. 110. 

 Ophiothrix, colonies of, ii. 113. 

 Ophiozona nivea, ii. 5, 110. 

 Ophiura Elaps, ii. 111. 

 Ophiurans, ii. 109. 



bathymetrical range of, ii. 1 14. 



Ophiurans, known previous to " Blake " Ex- 

 pedition, ii. 5. 



phosphorescence of, i. 199. 



Report on, by T. Lyman, i. xxi. 

 Ophiuridae, Lyman on, ii. 10! I. 

 Opisthoteuthis Agassizii, ii. 58. 

 Oplophorus, ii. 47. 

 Orbiculina adunca, ii. 160. 

 Orbitolites, ii. 160, 161. 

 Orbulina, i. 194. 

 Orbulina universa, ii. 166, 167. 



Krohn on, ii. 167. 



Pourtalos on, ii. 167. 



Organic 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. 193. 

 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 carbonic acid in sea water, i. 297. 

 Oxygen in sea water, Dittmar on, i. 295. 



Jacobsen on, i. 295. 



Pacific and Atlantic isotherms, i. 248. 



Paslopatides confundens, ii. 88. 



Paguroidea, ii. 40. 



Palsechinidae, ii. 94. 



Palaeotropus Josephinse, ii. 100. 



Paleopneustes hystrix, ii. 100. 



Palinurus, i. 175. 



Pallenopsis, ii. 50. 



Panceri on phosphorescence of marine ani- 

 mals, i. 198. 



Pandalus, ii. 4(1. 



Paracyathus confertus, ii. 149, 150. 



Parasitic algse, Geza Entz on, i. 214. 



Parasitic 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. "'!. 



