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 

 scoriae, 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 ' Montescopa,' and Mount 

 Garrinada is mis-spelt ' Gradenada.' 



Plate I. 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 



