4 Mr. Weaver on the Geological Relations of the South of Ireland. 



(4.) The surface of the transition district consists chiefly of chains of moun- 

 tains and hills, having generally a direction from W. to E.; and the principal, 

 rising in Iveragh, south of Dingle bay, in the county of Kerry, attains its 

 greatest elevation in Mac-GilHcuddy's Reeks, thence extending eastv\^ard 

 through the county of Cork between the rivers Lee and Blackwater*. The 

 less elevated ranges being nearly parallel to this main chain and to each other, 

 longitudinal valleys are inclosed between them, the course of which is indicated 

 by the principal streams ; but as sinuous valleys, dells, and deBles traverse the 

 chains, the region presents on the whole a considerably diversified aspect. 



(5.) All the elevations given in the following List marked (N.) were ascer- 

 tained by the late Mr. Alexander Nimmof ; those derived from the Trigo- 

 nometrical Survey of Ireland, marked (T.), I owe to the urbanity of Colonel 

 Colby, R. E., by whose directions they were furnished to me by Captain 

 Portlock, R. E. 



On the north side of Dingle Bay : Above level of sea. 



The Cahir-conree and Slieve Meesh range is in the chief points (N.) 2200 feet. 



But Bartrigoun, the highest point, is according to the Trigon. Survey. . (T.) 2784 

 While Brandon mountain, standing out on the N.and facing the Atlan-l ,rn, •. o,g^ 

 tic, is, according to the Trigonometrical Survey J 



On the south side of Dingle Bay, in the Iveragh mountains : 



Knochadubber, facing the Bay (N.) 2000 



Drung, do (N.) 1996 



Bennettee, in the interior (N.) 1262 



Knockalubrid, do (N.) 1556 



Cullee, on the east (N.) 2000 



Knockalin, on the south (N.) 2150 



Facing the north side of Kenmare Bay : 



In the Dunkerrin mountains the highest points vary from 1800 to .... (N.) 2000 



2'he south of the Bay : 

 The chief mountains rise, according to Mr. Nimmo, to a nearly equal 1 

 height^ J 



In Mac-Gillicuddy's Reeks, extending toward the Lakes of Killarney : 

 Gurrane Tual, which is the most elevated point, being also the highest -. 



land in Ireland, is according to Mr. Kirwan | ^ '^ ^"^^^ 



Mr. A. Nimmo (N.) 3410 



■ the Trigonometrical Survey (T.) 5404 



* For a view of this Chain, see Plate i. Sketches {a) and (6). 



t See Reports to Parliament on the Bogs of Ireland. 



X Smith in his Natural and Civil History of Kerry, p. 255, states that in the year 1756, at the 

 entrance of Kenmare river, the magnetic variation was 17° W. At Ross Island, in the lower lake 

 of Killarney, I ascertained the magnetic variation in 1829 to be 28° 45' W. 



