INDEX. 



213 



Plagusia, i. 175. 



range of vision of, i. 177. 

 Plants, absent in deep water, i. 107. 

 Platt, R., i. xii. 

 Platydia anomioides, ii. 77. 

 Plectromus suborbitalis, ii. 28. 

 Pleurocarpa ramosa, ii. l-'>7. 

 Pleuropus, i. 187. 



Pleurotoma (Ancistrosyrinx) elegans, ii. 66. 

 Pleurotoma Blakeana, ii. 60. 

 Pleurotoma curta, ii. 00. 

 Pleurotoma limacina, ii. 00. 

 Pleurotoma subgrundifera, ii. 60. 

 Pleurotomaria Adansonianu, ii. (ii*. 

 Pleurotomaria, bathymetrical range of, i. 



169. 



Pleurotomaria Quoyana, ii. 60. 

 Pleurotomida?, ii. 00. 

 Pliobothrus symmetricus, ii. 138, 139. 

 Plumularida3, ii. 135. 

 Pneumodermon, i. 121. 

 Podocidaris sculpta, ii. 92. 

 Pollicipes, ii. 51. 

 Polycistina}, i. 195. 

 Polyclonia, i. 177. 



lives on the bottom, i. 185. 

 Polymorphina ovata, ii. 166. 

 Polyps, ii. 142. 

 Polystomella crispa, ii. 169. 

 PolystomellaB, i. 271. 

 Polytrema miniaceum, ii. 169. 

 Pomalostegus stellatus, ii. 57. 

 "Porcupine," i. 245. 



cruise of the, i. 40. 



deep-sea temperatures by, i. 46. 



expedition of the, i. 43. 

 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. 

 Porpitidse, affinities of, i. 184. 

 Port de France, i. xvi. 

 Porto Rico, land shells of, i. 1 15. 

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



exploration of, in " Bibb," i. 45. 



exploration of, in "Corwin," i. 45. 



on affinity of deep-sea corals and tertiary 

 fossils, ii. 17- 



on houndary of siliceous sand, i. 279. 



on characteristic foraminifera, i. 271. 



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



on corals of West Indies, ii. 18. 



Pom tales, L. F., on deep-sea corals and ter- 

 ti.n-y types, ii. 19. 



on penetration of light, i. :;o."). 



Report on Corals, i. x\i. 

 Pourtales Deep, i. KM;. 

 Pourtales Plateau, i. 62, 284, 286. 



fauna of, i. 1)1. 

 Pourtalesia miranda, ii. 101. 

 Pourtalesiai, i. 150. 



affinities of, ii. 101. 



forerunners of spatangoids, ii. 07. 

 Praya, ii. 135. 



Pre-archaean 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. 140. 

 Primordial ocean, fauna of, i. 153. 



Mallet on, i. 153. 

 Protoplasm, i. 149. 



Protozoans without solid tests, ii. 157. 

 Pseudodiadematidse, i. 150. 

 Psolus tuberculosus, ii. 85. 

 Psychropotes longicauda, ii. 86. 

 Pterophryne, nest of, ii. 31. 

 Pterophysa grandis, i. 184. 

 Pteropod and globigerina ooze, i. 264. 

 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. 

 Pulvinulina 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. o9. 



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

 Pycnogonids, ii. 49. 

 Pylocheles Agassizii, ii. 40. 

 Pyrosoma, i. 187. 

 Pyrosomae, i. 198. 



Quoy and Gaimard on limit of reef -building 

 corals, i. 74. 



