LIST OF WOOD-CUTS. 
No. Page 
1. Diagram showing the order of succession of stratified masses . 15 
2. Diagram showing the relative position of the Primary, Secondary, 
and Tertiary strata . . . , 16 
3. Diagram showing the relative age of the strata of the Paris basin, and 
those of the basin of the Loire, in Touraine . . 20 
4. Diagram showing the same in the strata of Suffolk and Piedmont 21 
5. Diagram containing sections in the Val di Noto, Sicily . , 64 
6 1 
]j' i Horizontal sections of dikes near Palagonia . . 69 
8. Section of horizontal limestone in contact with inclined strata of Tuff 
in the hill of Novera, near Vizzini , . .70 
9. Section of calcareous grit and peperino, east of Palagonia, south side 
of the pass ..... 72 
10. Section of the same beds on the north side of the pass . . 72 
11. Outline view of the cone of Etna from the summit of the limestone 
platform of Primosole , ■ . .75 
12. Section from Paterno by Lago di Naftia to Palagonia . . 76 
13. Section of beds of clay and sand capped by columnar basalt and con- 
glomerate at La Motta, near Catania . . , 77 
14. View of the Isle of Cyclops, in the Bay of Trezza . . 79 
15. Diagram showing the contortions in the newer Pliocene strata of the 
Isle of Cyclops 80 
16. Horizontal section showing the invasion of the newer Pliocene strata 
of the Isle of Cyclops by lava . . . .81 
17. Wood-cut showing the great valley on the east side of Etna . 83 
18. Diagram explanatory of the origin of the Valleys of Calanna and St. 
Giacomo, on Etna . . . . .86 
19. View of dikes at the base of the Serre del Solfizio, Etna . 90 
20. View of tortuous dikes or veins of lava, Punto di Guimento, Etna . 91 
21. View of the rocks Finochio, Capra, and Musara, in the Val del Bove 92 
22. View from the summit of Etna into the Val del Bove . 93 
23. View of the Valley called Gozzo degli Martiri, below Melilli . 110 
24. Diagram showing the manner of obliteration of successive lines of sea-cliff 1 1 1 
25. View of dikes or veins of lava at the Punto del Nasone, on Somma 122 
26. Diagram showing the superposition of alluvium and cave deposits con- 
taining extinct quadrupeds to a limestone containing recent shells 139 
27. Diagram showing the position of the Cave of San Ciro, near Palermo 141 
28. Diagram showing the position of Tertiary strata at Genoa . 166 
