154 Proceedings of the Royal Irish Academy. 



object far out at sea fi-om the decks of sMps approacliiiig the north 

 <;oast of Ireland from the Atlantic." 



(p. 14.) — " Sea Loughs. — The coast between Lough Swilly and 

 GweebaiTa Bay is deeply indented by several bays and sea loughs, of 

 •which Mih'oy Bay and Sheep Haven are the most important. The 

 latter is a broad bay, the entrance to which is bounded by the bold 

 cL'ffs of Horn Head on the west, and by the less elevated coast of 

 Doagh on the east." 



(p. 15.) — " Isla>uls. — In addition to Horn Head, which is an island, 

 there are several islands lying off the coast of north-western Donegal 

 requu'ing special notice. Of these, Tory and Aran Islands are the 

 most important. 



" Tory Island, in ancient writings Toirinis and Toraeh, 'the Island 

 of Towers,' is remarkably distinct when viewed from the mainland 

 between Dunfanahig and Cross Beads. It lies at a distance of about 

 eight miles fi'om the coast of Horn Head, the bottom of the sea 

 descending to 24 fathoms. Along the north-east, the island presents 

 a bold front of naked rock towai'ds the Ocean ; but on the south side 

 the wide bay of Camusmore affords shelter and anchorage for ships 

 and jSishing boats. The western shore is shelving, and is lined by a 

 remarkable shingle beach forming a natural breakwater, and giving 

 evidence from its extent of the force and sweep of the Atlantic billows 

 when impelled by the prevalent westerly winds. 



"Aran Island.^ — This is a large island separated from the mainland 

 by a sound about half a mile across. 



" The numerous rocky islets lying off the coast between Gweebarra 

 Bay and the Bloody Foreland are all formed of granite." 



(p. 17). — " As regards the occurrence of pebbles of granite, &c. 

 in the quartzite, and limestone, it is believed that they have been 

 derived from rocks older than the gi-anite (not improbably of Archaean 

 Age), and now submerged beneath the waters of the Atlantic." 



(p. 72.) — " bloody Foreland District and adjoining Islands.''' 



(p. 73.) — "Bugged cliffs, sometimes 100 feet in height, bound 

 Gola Island and Hmffn Island, especially on the west. These are 

 penetrated by sharp fissures, hollowed out along the joint planes, so- 

 that, in some cases, one side overhangs the sea at an angle of 70° or 

 80°. IS'atural arches also occur, as at Scoltydoogan, north of Gola 

 Island, where a small inlet, entered by a narrow gully, communicates 

 with the sea by means of an arched passage about 40 yards in length, 

 at a depth of 70 feet below the surface of the ground. At 

 Scoltaglassan, nearly half a mile east of Torglass Island, a narrow 



