138 



INDEX. 



Plagioclase, striping or striae of. See 



Feldspars. 



Plateaux, continental, in relation to 

 the intervening oceanic depres- 

 sions, 110, 112. 



Pliny, his name chrysolite, 61. 

 Plombieres, action of alkaline water 



on Roman masonry at, 35. 

 Plutonists, Sterry Hunt on, 30. 

 Podermo (Tuscany), argillaceous 

 schist changed into serpentine, 

 44,97. 

 Polarization of serpentine, 50, 63. 



of peridote. See Peridote. 



Polinally (Scotland), " lime and ser- 

 pentine beds " of, 55. 

 Pompeii, its ruins contain fragments 



of ophi-calcite, 11. 

 Pontefract sandstones of the Permian 



system, 102. 



Porphyritic serpentinyte of the Li- 

 zard. See Lizard. 



rocks near Galway, serpenti- 



nized, 27, 41. 



Porthlisky ( Pembrokeshire) , ' l impure 

 limestone beds " of, 83, 84. 



( ), malacolite .replaced by 



calcite, xvi, 83. 

 Portsoy, serpentine and other rocks 



of, 30, 54, 55. 

 Post-Archaean ophites and henii- 



threnes, 87, 96. 



Potsdam rocks, rarity of non-crystal- 

 line limestones in, 84, 85, 88. 

 Prato (Central Italy), ophites of, 46. 

 Pre-Cambrian metamorphics of East- 

 ern North America (Hunt), 33. 

 Predazzite (hydrous dolomite) of 



Conzocoli (Tyrol), 7, 41. 

 Presidential Address of Leonard 

 Homer, 48. 



of H. C. Sorby, 109. 



of Dr. A. Macalister, xxix, 



xxx. 

 Pre-Silurian metamorphics according 



to Sterry Hunt, 33. 

 "Primary limestone." See Hemi- 



threnes. 

 " Primitive water " in granite and 



metamorphics, 34, 35. 

 Prochlorite, 5. 

 Productus horridiis, P. giganteus, P. 



ponderosus, their habitat, 103. 

 " Protogsea" of Leibnitz, 28. 

 Protogines, 2. 



Protozoans of the Cambrians, 85. 

 Pseudo-diallage, 5. 



Pseudomorphic serpentine minerals, 



Pseudomorphism, vi, xiv, xxxv,xxxvi, 

 xlix, 1, li, 11, 19, 23, 24, 57. 



Pseudophite, 5. 



Pusyrewski on "Eozoon" xx. 



Pyrallolite a serpentinous mineral, 

 5,6. 



Pyrocaustic rocks according to Bun- 

 sen, 35. 



Pyrosclerite a serpentinous mineral, 

 5, 27, 52. 



in " Eozoon" xlvii, 124. 



Pyroxene, white. See Malacolite. 



" Pyroxenique '* rocks according to 

 Alex. Brongniart, 47. 



Pyroxenites, their association with 

 hemithrenes, 78, 81, 82. 



Q. 



Quarry-water (" eau de carriere), 35. 

 1 Quarterly Journal of the Geological 



Society,' 22, 28, 29, 35, 37, 42. 

 Quartz, pseudomorphic and original, 



Quartzites &c. of Loch Eribol, 33. 



Quebec fault, its extent and direc- 

 tion, 111. 



"Quebec rocks" in Canada and 

 Northern New York, 48, 88. 



Queen's College, Galway, specimens 

 in Geol. Museum of, 18, 27, 94. 



R. 



Ragged Chute (Madawaska, Canada), 



corrugated layers of gneiss and 



limestone, 72. 

 Ramsay, Dr. A., on rock metamor- 



phism, v. 



on origin of Archaean lime- 

 stones, xxh. 

 on Permian formations, 91. 99, 



101, 103-106, 119. 



adopts " Eozoon" xxii. 



Reade, T. Mellard, opposes "Eozoon" 



xxvi, xxvii. 

 Regional cyclical vertical movements 



of the earth's crust. 100-102, 106, 



113-115. 

 metamorphism. See Metamor- 



phism. 

 Reichenstein (Silesia), chrysotile of, 



8, 15, 16, 123. 

 Regard, Abbe, on the < Challenger ' 



soundings, 75. 



