DESCRIPTION OF THE PLATES. 



Plate dl.il^g. 3. Another example of contortion in miea slate in Ardgowar^ 

 p. 438. 

 The other figures exhibit various instances of curvature and con- 

 tortion in veins of granite and quartz, traversing gneiss and mica 

 slate, in different parts of Scotland, p. 439 and 440. 



Plate 32. Fig. 1. Contortion of mica slate at Loch Lomond, p. 438. 



PLATE 32, Fig. 2. 



In illustration of Dr. MacCuUoch's paper on Quartz Rock, p. 450. 



View of the coast off the Row-storr of Assjnt, intended to shew 

 the detached position of the quartz rock mountains. The 

 conical mountain on the left is the Sugar-Loaf at the entrance of 

 Loch Inver and Loch Enard ; on the right is the entrance of Loch 

 Broom and Loch Groinard^ p. 438. 



PLATES 33, 34, and 34.* 



f 



In illustration of the Rev. J. J. Conybeare's paper on Clovelly, North Devon,- 

 p. 495. 



PLATE 35. 



In illustration of Dr. MacCuUoch's paper on StafFa, p. 501, and described 

 p. 507. 



PLATES 36, 37, 38, 39. 



In illustration of Dr. MacCuUoch's paper on Vegetable Remains preserved 

 in Chalcedony, p. 510. 



Plate 36, described p. 52S. 



37, 524. 



38, 



'4 

 3,/ 



39, ' ''' 



N. B. The Figure attached to each Specimen is intended to express the number 

 of times it is magnified in the Drawing. 



