102 
INDEX. 
Prevost, M. Constant, on the tertiary strata 
of Vienna, 21, 212 
tabular view of his arrangement of 
the strata of the Paris basin — see wood- 
cut No. 59, 243 
1 on the alternation of the calcaire 
grossier, and siliceous limestone, 246, 
248 
, on the manner in which the mammi- 
ferous remains may have been preserved 
in the Paris gypsum, 252 
on the alternation of strata with and 
without organic remains, 254 
Primary, on the rocks usually termed, 10, 
352 
their relation to volcanic and sedi- 
mentary formations, 352 
divisible into two groups, the strati- 
fied and unstratified, 353 
on the stratified rocks called, 12, 365 
the term why faulty, 374 
— strata, how far entitled to the appel- 
lation, 377 
Primitive, term now abandoned, 13 
Primosole, termination of the Val di Noto, 
limestone at, 75 
view of Etna from — see diagram 
No. 11, 75 
Procida, island of, would resemble Ischia 
if raised, 127 
Pulo Nias, fossil shells of recent species 
found in the island of, 134 
Pulvermaar, description of the, 197 
Punto del Nasone on Somma, dikes or 
veins of lava seen at — see wood-cut No, 
25, 122 
Punto di Guimento, veins of lava at — see 
wood-cut No. 20, 91 
Purace, extinct volcano of, 252 
Pusanibio river, sulphuric and muriatic 
acids, and oxide of iron in the waters of 
the, 252 
Puy Arzet, chalk with conformable beds of 
tuff in the hill called, 207 
Puy de Come, ravine excavated through 
the lava of the, 264 
Puy de Jussat, quartzose grits of, 229 
Puy de Marmont, alternation of volcanic 
tuff and fresh-water marl in the, 258 
Puy de Pariou, 268 
Puy Rouge, ravine cut through the lava 
of the, 265 
Puy de Tartaret, 264 
Puy en Velay, bones of extinct quadru- 
peds in alluvium under lava near, 219 
— — fresh-water formation of, 235 
Puzzuoli, inland cliff near, will be de- 
stroyed, 112 
no great wave caused by the rise of 
the coast near, in 1538, 128 
Pyrenees, tertiary strata at the eastern ex- 
tremity of the, 170 
Pyrenees, tertiary formations between the 
basin of the Gironde and the, 206 
their relative age, 341 
tertiary strata abutting against verti- 
cal mica-schist at the eastern end of 
the, 348 
— — lamination of clay-slate in the — see 
wood-cut No. 89, 366 
Quartz, compact, whence derived, 373 
Quorra, or Niger, delta of the, 329 
Radicofani, sub-Apennine marls capped 
by basalt at, 159 
age of the volcanic rocks of, 183 
Radusa, fossil fish found in great abun- 
dance at, 67 
Ramond, M., on alluviums of Auvergne, 
267 
Ramsgate, recent deposits in the cliffs 
near, 182 
Ravines excavated through the lavas of 
Auvergne, 264, 265 
Recent formations, description of, 52 
— — form a common point of departure 
in all countries, 58 
why first considered, 62 
Recent and Tertiary formations, synoptical 
table of, 61 
Red marl and sandstone of Auvergne like 
' new red sandstone,' 229, 333 
Red marl, supposed universality of, 333 ' 
Red Sea, and Mediterranean, distinct as- 
semblages of species found in the, 41, 
205 
tertiary strata found on its western 
borders, 135 
list of fossil shells from — see Appen- 
dix II., 57 
Rennes, tertiary strata near, 276 
Rhine, lower, volcanos of the, 193 
map of the volcanic district of the,194 
— r— age of the volcanic rocks of the, un- 
certain, 199 
— — — origin of the trass of the, 197 
ancient alluviums of the, 200 
Rhone, delta of, in lake of Geneva, 27 
shells drifted from the Alps to the 
Mediterranean by the, 48 
Riccioli, Signior, tusk of the mammoth 
from the Roman travertin shown to the 
author by, 138 
Rimao, valley of, lines of ancient sea-cliffs 
in, 130 
Ripple marks formed by the wind on the 
dunes near Calais — see wood-cut No. 
36, 176 
Risso, M., on the fossil shells of Groseil, 
near Nice, 135 
on the fossil shells of St. Madeleine, 
near Nice, 168 
Rivers, difference in the sediment of, 40 
