INDEX. 



213 



Plagusia, i. 17">. 



range of vision of, i. 177. 

 Plants, absent in deep water, i. 107. 

 Piatt, R., i. xii. 

 Platydia anomioides, ii. 77. 

 Plectronms saborbitalis, ii. 28. 

 Pleurocarpa ramosa, ii. J.J7. 

 Pleuropus, i. 187. 



Pleurotoma (Ancistrosyrinx) elegans, ii. (id. 

 Pleurotoma Blakeana, ii. 66. 

 Pleurotoma carta, ii. 66. 

 Pleurotoma limacina, ii. 66. 

 Pleurotoma subgrundifera, ii. 66. 

 Pleurotomaria Adansonian.i. ii. 69. 

 Pleurotomaria, bathymetrical range of, i. 



169. 

 Pleurotomaria Quoyana, ii. 69. 

 Pleurotomidse, ii. 66. 

 Pliobothrus symmetricus, ii. KJ8, I;)',*. 

 Plumularidse, ii. 135. 

 Pneumodermon, i. 121. 

 Podocidaris scidpta, ii. 02. 

 Pollieipes, ii. 51. 

 Polyeistina?, i. 195. 

 Polyclonia, i. 177. 



lives on the bottom, i. 185. 

 Polymorphina ovata, ii. 100. 

 Polyps, ii. 142. 

 Polystomella crispa, ii. 169. 

 Polystomellae, i. 271. 

 Polytrema miniaeeum, ii. 169. 

 Pomalostegus stellatus, ii. .">7. 

 '" Porcupine/' i. 24o. 



cruise of tbe, i. 40. 



deep-sea temperatures by, i. 46. 



expedition of tbe, i. 41. 

 Porina subsulcata, ii. 82. 

 Porites clavaria, i. 82. 

 Porites embryo, i. 74. 

 Porites furcata, i. 82. 

 Porocidaris, i. 158. 

 Porocidaris Sharreri, ii. 90, 91. 

 Poromya, ii. 73. 

 Porpita, i. 121, 180. 

 Porpitidas, affinities of. i. 184. 

 Port de France, i. xvi. 

 Porto Rico, land shells of, i. 1 1.1. 

 Pourtales, L. F., i. vii, 3. 



exploration of, in " Bibb," i. 4~>. 



exploration of, in "Corwin," i. 4.j. 



on affinity of deep-sea corals and tertiary 

 fossils, ii. 17. 



on boundary of siliceous sand. i. 279. 



on characteristic foraminifera. i. 271. 



on corals of the ''Blake." ii. 148. 



on corals of West Indies, ii. IS. 



Pourtales, L. P., on deep-sea corals and ter- 

 tiary types, ii. 19. 



mi penetration of light, i. 305. 



Report on Corals, i. xxi. 

 Pourtales Deep, i. 106. 



Pourtales Plateau, i. 62, 284, 286. 



fauna of, i. '.'1. 

 Pourtalesia miranda, ii. 101. 

 Pourtalesi.e, i. 159. 



affinities of, ii. KM. 

 forerunners of spatangoids, ii. '.'7. 

 Praya, ii. 135. 



Pre-archsean continent, i. 127. 

 Preservation of animals in bottom deposits, 



i. 170. 

 Pressure, adaptation of marine animals to, 

 i. 304. 



range of, for marine animals, i. 301. 

 Primnoa Pourtalesii, ii. 146. 

 Primordial ocean, fauna of. i. 153. 



Mallet on, i. 153. 

 Protoplasm, i. 140. 



Protozoans without solid tests, ii. 157. 

 Pseudodiadematida'. i. L59. 

 Psolus tuberculosus, ii. 85. 

 Psychropotes longicauda, ii. 86. 

 Pterophryne, nest of, ii. 31. 

 Pterophysa grandis, i. 184. 

 Pteropod and globigerina ooze. i. 2»i4. 

 Pteropod ooze, depth at which it appears, i. 

 50, 147. 



depth at which found, i. 265. 



in Straits of Florida, i. 283. 

 Pteropod shells, in globigerina ooze. i. 

 283. 



decay and solution of. i. 283. 



Murray on solution of. i. 283. 

 Pteropod silt in Windward Passage, i. 



235. 

 Pteropods. i. 190. 

 Pterotrachea. i. 191. 

 Ptychogena lactea, ii. 128. 

 Pulvhmlina auricula, ii. 169. 

 Pulvinulina Menardii. ii. 169. 

 Pumice, decomposition of, i. 267. 



floated out to sea. i. 267. 



taken by tow-net. i. 267. 

 Pycnogonidae, eyes of. ii. .".0. 



Report on. by E. B. Wilson, i. xxi. 

 Pycnogonids, ii. 4'.'. 

 Pylocheles Aga.ssizii, ii. 4'>. 

 Pyrosoma, i. 187. 

 Pyrosonue. i. 198. 



Quoy and Gaimard on limit of reef-building 

 corals, i. 74. 



