MAPS
| I. | General map of the Volcanic districts of the British Isles—[At the end of the volume] |
| II. | Map of the Cambrian and Silurian volcanic region of North Wales [To face p. 256] |
| III. | Map of the Old Red Sandstone volcanic region of "Lake Caledonia" in Central Scotland and North Ireland [To face p. 334] |
| IV. | Map of the Carboniferous volcanic districts of Scotland [To face p. 476] |