O'Reilly — On the Waste of the Comt of Ireland, 6jc. 167 



geological interest. It lies wholly in the County Mayo. It is bounded 

 on the south by Clew Bay, and on the west by part of Curraun, Achill, 

 and part of the Blacksod Bay. 



(p. 17.) — " On the shores of Tullaghan Bay below high-water 

 mark, numerous large trunks and roots of trees are to be met with 

 resting in the bog, showing the existence of extensive forest in the 

 locality at one time. At present the whole country is quite destitute 

 of timber of any kind." 



Memoir of Geological Survey of Ireland (Sheet 62 and northern 

 part of Sheet 73). 



(p. 7.) — " The area described embraces a small portion of the coast 

 of west Mayo, from Ballycroy to Blacksod Bay. As also the Islands of 

 Achill, Achill Beg, Clare, Innishbiggle, Innishgalloon, Duvillaun, 

 Leamarch, &c. 



" The whole of the Island of Achill, and a considerable portion of 

 the adjacent mainland, is of extremely mountainous character. The 

 Island of Achill, whose extreme dimensions from east to west are 

 1 5 miles, and from north to south 1 1 miles, is separated from the 

 mainland by Achill Sound, a channel of the average width of from 

 half to three-quarters of a mile, narrowing to about 300 yards at 

 BuUsmouth, the Eerry, and Darby's Point, and spreading out into a 

 large expanse of water north of the ferry between Achill and Bally- 

 croy, containing the Islands of Innishbiggle, Annagh, &c., and 

 sweeping away to the eastward and southward, joins Ballycragher 

 Bay, forming with the waters of Clew Bay at Mulranny, a peninsula 

 of that large tract of country which lies to the west of the village, of 

 which Curraun Hill, 1715 feet high is a conspicuous featui'e. 



" Proceeding to the west, or west 20° north, from the ferry at the 

 Sound, the ground rapidly rises within a distance of 4^ miles as the 

 crow flies, till it attains west of the village of Mweelin, an elevation of 

 1530 feet, forming there a ridge or tableland running due south for 

 nearly 3 miles, and terminating at a height of 818 feet in Dooega 

 Head. Its western margin descends with a nearly vertical descent of 

 900 feet into the sea, forming the precipitous and picttu-esque cliffs of 

 Minaun. To the north of this, and east of the Protestant colony, the 

 ground again rises 698 feet above the sea level, whilst immediately 

 to the west abruptly rises the mountain of Slievemore, attaining a 

 height of 2204 feet within a horizontal distance of one mile. This 

 mountain gradually slopes to the west, and at a distance of 1^ miles 

 from its apex, terminates at Ooghnaboo, in sea cliffs 80 feet high. Its 



