152 Proceedings of the Royal Irish Academy. 



word for big or large. ^ There is actually no very big strand at tbe 

 present day, as I am informed by Mr. Cruise, -svlio geologically sur- 

 veyed the island ; but there is a raised beach extending right across 

 the '"vrestem side of the island, noTV about 50 feet above Ordnance 

 datum, or 30 feet above high-water mark, and it is not improbable 

 that at the time the island received its name this may have been a big 

 strand in the ordinary sense of the word.) 



" The Garvan Islands form another group of rocky islets, three in 

 number, rising about a mile from the coast of ilalin Head, and formed 

 of quartzite, "while another small islet, called Glashedy Island, lies 

 a mile ofi the coast in the bay between the prominences of Dunaff 

 Head and !3Ialin Head. This island is formed of quartzite." 



(p. 22.) — " At Glengad Head crumpled micaceous schists form a 

 vertical cLLff, 200 feet high; sections in similar beds are also freely 

 exposed along the coast line to their junction with the quartzite." 



(p. 26.) — " Moville District. — This tract of country is as wild and 

 rugged as almost any part of Donegal, the coast line being bold and 

 precipitous, except on the south-east along the shore of Lough Foyle. 

 On the north the sea-clrffs reach a height of 400 and 500 feet, and are 

 in but few places accessible except by boat." 



(p. 33.) — " For some three miles south-west of Moville, a line of 

 gravel cliffs at an average height of about 50 feet borders Lough 

 Foyle, and similar' though smaller deposits may be observed on the 

 shores of Lough Swilly. 



" Raised Beaches. — An extensive raised beach, probably the repre- 

 sentative of the 25 feet beach of Scotland, borders the alluvial plain 

 south-east of Inch Island, continuing to the south-west along the 

 valley between Carowen and £urt, opening into the Blanket iSTook, 

 while to the east it occupies the valley that extends from Bumfoot, in 

 a south-easterly direction to Pennybum, the average height observed 

 being 32 feet. At Farland Point, south of Inch Island, and along the 

 coast of Lough Swilly, south-westwards, portions of a raised beach at 

 the same elevation remain. Small portions of a raised beach are also 

 seen on the southern and eastern shores of Inch Island, and a more 

 extensive one stretches along the shore of Lough Swilly for about a 

 mile and a-half north of Pahan to Buncrana." 



(p. 34.) — " On Inishtrahull a fine example of a 50 feet raised 

 beach occurs in the centre of the island. The lightkeeper informed me 



1 " Hulk " is a word still used among country people in the north of Ireland to 

 mean a big lazy fellow. 



