186 Proceedings of the Royal Irish Academy. 



west 30° south.. Its greatest breadth. Ca little -west of Poulnasherry 

 Bay) is five miles, from which point it varies considerably towards 

 the west on account of the irregular form of its southern shore. 

 Thus, at Carrigaholt it is nearly three miles broad, at Xilbaha, 1|-, 

 while approaching Loop Head it rapidly contracts, so that half a mile 

 before reaching that point its breadth is little more than J mile. It is 

 bounded by precipitous cliffs, which in many places assume fantastic 

 forms, resulting from the action of the sea on the rocks. On the 

 north-west shore these cliffs attain in some places to an elevation of 

 200 feet perpendicularly above the sea ; but along the shore of the 

 Shannon they do not exceed 100 feet." 



(p. 6.) — " The shore of the Shannon, south-east of Kilrush, is 

 very varied in form. In some places the ground terminates abruptly in 

 cliffs ranging fi'om 40 to 100 feet in height, while at others it slopes 

 almost imperceptibly towards the river." 



"The width of the Shannon between the shores of Clare and Kerry 

 in this map varies from two to three miles." 



(p. 13.) — "At the north side of the Loop, the cliffs are 200 feet 

 high. Dermot and Graine's Eock separated from the mainland by a 

 chasm 95 feet in width at the top, forms a striking object. (Fig. 4)." 



Memoii- Geological Survey of Ireland (Sheet 142), 1860. That 

 part of the Sheet which lies north of the River Shannon belongs to the 

 County Clare. At the south-west comer of the Sheet there is a small 

 portion of the County Kerry. At the south-west corner of the Sheet 

 there is a small portion of the County Kerry, in which is the little 

 town of Tarbert. (J^o available details given.) 



Memoir Geological Sui'vey of Ireland (Sheet 143), 1860. The 

 River Shannon runs with a general beariug east and west through 

 the northern part of the distiict described. (No available details 

 given.) 



Memoir Geological Survey of Ireland (Sheets 150 and 151), 1859. 

 The principal features of the district described are, the promontory of 

 Kerry Head on the west, rising to the height of 700 feet. The 

 promontory of Kerry Head may be described as a regularly formed 

 hill, upwards of twelve miles long, from its western extremity to the 



