372. Section across the Granophyre Sills at Loch a' Mhullaich, above Skulamus, Skye 433 373. Section to show the connection of a sill of Granophyre with its probable funnel of supply, Raasay 436 374. Granophyre sill resting on Lower Lias shales with a dyke of basalt passing laterally into a sill, Suisnish Point, Isle of Raasay 436 375. Weathered surface of spherulitic Granophyre from dyke in banded gabbros, Druim an Eidhne, Meall Dearg, Glen Sligachan, Skye. Natural size 438 376. Plan of portion of the ridge north of Druim an Eidhne, Glen Sligachan, Skye, showing three dykes issuing from a mass of Granophyre 439 377. Weathered surface of spherulitic Granophyre, from dyke in banded gabbros, Druim an Eidhne, Meall Dearg, Glen Sligachan, Skye. Natural size 440 378. Plan of pale Granophyric dyke, with spherulitic and flow-structure, cutting and enclosing dark gabbro, Druim an Eidhne 441 379. Dyke (six to ten feet broad) proceeding from a large body of Granophyre and traversing gabbro, from the same locality as Figs. 375 and 377 442 380. Section of intruded veins of various acid rocks above River Clachaig, Mull 443 381. Pitchstone vein traversing the bedded basalts, Rudh an Tangairt, Eigg 445 382. Reversed fault on the eastern side of Svinö, Faroe Isles 454 383. Reversed fault on the north-east headland of Sandö, Faroe Isle 454 MAPS V. Map of the Permian volcanic districts of Scotland _To face p._ 106 VI. Map of the Tertiary volcanic region of the West of Scotland _To face p._ 296 VII. Map of the Tertiary volcanic district of the North-East of Ireland _To face p._ 446 CHAPTER XXIX THE CARBONIFEROUS VOLCANOES OF ENGLAND The North of England: Dykes, The Great Whin Sill--The Derbyshire Toadstones--The Isle of Man--East Somerset--Devonshire 1. THE NORTH OF ENGLAND