LIST OF PLATES AND WOOD-CUTS 
IN THE THIRD VOLUME. 
PLATES. 
Frontispiece. View of the volcanos around Olot, in Catalonia. 
See p. 186, This view is taken from a sketch by the author ; 
an attempt is made to represent by colours the different geo- 
logical formations of which the country is composed. The blue 
line of mountains in the distance are the Pyrenees, which are to 
the north of the spectator, and consist of primary and ancient 
secondary rocks. In front of these are the secondary for- 
mations, described in chap, xiv., coloured purplish-grey of 
different tints, to express different distances. The flank of 
the hill, in the foreground, called Costa di Pujou, is com- 
posed partly of secondary rocks, which are seen to the left of 
a small bridle-road, and partly of volcanic, the red colour 
expressing lava and scoriae. ' 
Several very perfect volcanic cones, chiefly composed of red 
scoria?, and having craters on their summits, are seen in the 
immediate neighbourhood of Olot, coloured red. The level 
plain on which that town stands has clearly been produced by 
the flowing down of many lava-streams from those hills into 
the bottom of a valley, probably once of considerable depth, 
like those of the surrounding country, but which has been in a 
great measure filled up by lava. 
The reader should be informed, that in many impressions of 
this plate Montsacopa is mis-spelt c Montescopa,' and Mount 
Garrinada is mis-spelt ' Gradenada.' 
Plate L The shells represented in this plate have been 
selected by M. Deshayes as characteristic of the Pliocene period 
of the Tables, Appendix I. The greater part of them are 
common both to the older and newer Pliocene periods of this 
work. Eight of the species, Nos. 1, 3, 5, 6, 7, 9, 13, and 14, 
are now living, but are given as being also found in the Older 
Pliocene formations, Fusus crispus is not found either recent 
