182 Proceedings of the Royal Irish Academy. 



(p. 36.) — '■'■ Idands off Errisainhagh: Inishtreh. — This is a small 

 island on the extreme north-west of the Errisainhagh promontory ; 

 during low water it is joined to the mainland hy a bank of gravelly 

 shingle, which also covers the greater part of the island — the rock is 

 porphyritic granite. 



" FreagJiiUaun, Eush Idand.^ and Inishhigger. — These islands lie in 

 the entrance to and west of the Moyms Eoat Harbour. The south 

 and south-west shores of Freaghillaun are covered with large rect- 

 angular blocks of an even-grained granite, with black mica, similar to 

 the rock about !Mall Head. 



" 8t. Macdara^s Idand, or as it was anciently called Croach Hie 

 Dara, i.e. '■ Macdard's stack or ricW — The shape of the island may 

 partially be due to ice erosion, as many of the rocks have the appear- 

 ance of being ice-di-essed. However its slopes, more specially those 

 northward and southward, appear in a great measure to be due to the 

 structure of the rock, as it is inclined to split ofi nearly everywhere 

 in plates a few feet thick. This remarkable weathering can be well 

 examined at the south-west of the island, where the waves of the 

 Atlantic ai'e yearly quarrying largely, and hurling up the blocks above 

 high-water mark, thereby forming a beach of huge blocks, and one of 

 considerable size that was measured, gave 21 by 21 by 2 feet as its 

 dimensions. 



'■'■ Mason Idand Yit^ a little east-south-east of St. Macdara's. On 

 the west there are numerous angular blocks and boulders scattered 

 along the shore, while on the east the rock is covered with sand. 



" Wherron, Avery, and Ardnacross Islands. — The two former lie 

 north-west, and the latter east of Mason Island, from which it is 

 separated by a creek, which is fordable during low water, while all 

 are nearly covered by the tide at high water. 



"Mweenish Island, IiishtrogJien, and Tidal RocJcs. — Mweenish 

 bounds Ards Bay on the south, and is connected with the mainland 

 by a pass, that is fordable at half-tide." 



(p. 38.) — " Duck Island lies about half a mile south of Mweenish. 

 and its subjacent rocks are similar to those on the south part of that 

 island. 



" Finish Island. — This island bounds Mweenish Bay, on the south- 

 east, and is connected to the mainland at low water by a strand. A 

 mile south of this island is Iniskmuslcerry . 



" Birmore and Birheg Hands and Tidal Rocks. — Birbeg is situated 

 about a mile south-south-west of Ardmore Point, and Birmore south 

 of the latter, the two being connected during low water." 



