THE LAKES OF SNOWDONIA AND EASTERN CARNARVONSHIRE. 467 



EXPLANATION OF PLATES. 



Plate I. 



The upper figure shows Glaslyn, with the great precipice of Y Wyddfa above. 

 The lower figure shows Gwynant, with the alluvial flat extending above the lake. 



Plate II. 



The upper figure shows the Lakes of Llanberis, with the alluvial flat stretching up to Gwastad-Nant. 

 The lower figure shows the remarkably flat-bottomed valley of Nant Francon. 



Plate III. 



Shows the general distribution of the lakes and the physical features of the district. The lakes 

 described in the text are coloured blue. 



The next four Plates give the details concerning each lake. In each case the contour lines and the 

 greatest depth are marked in feet. In some cases the figures are indistinct, but they run thus : — 



Plate IV. 



Llydaw— 20, 60, 80, 100, 120, 140, 100, 180. Greatest depth, 190. 

 Glaslyn— 20, 40, 60, 80, 100, 120. Greatest depth. 127. 

 Padarn— 20, 40. 60, 80. Greatest depth, 94. 

 Peris— 20, 40, 60, 80, 100. Greatest depth, 114. 



Plate V. 



Gwynant— 10, 20, 30, 40, 50. Greatest depth, 54. 

 Dinas— 10, 20, 30. Greatest depth, 30. 



Cwellyn— 20, 40, 60, 80, 100, 110, 120. Greatest depth, 122 

 Idwal— 10, 20, 30. Greatest depth, 36. 



Plate VI. ' 



Ogwen — 5, 8, 10. Greatest depth, 10. 

 Crafnant— 10, 20, 40, 60. Greatest depth, 71. 

 Mymbyr— Upper Lake— 10, 20. Greatest depth, 29. 

 ,, Lower Lake — 10, 20. Greatest depth, 29. 



Geirionydd— 10, 20, 30, 40. Greatest depth, 48. 

 Dulyn— 20, 40, 60, 80, 100, 120, 140, 160, 180. Greatest depth, 189. 



Plate VII. 



Eigiau— 10, 20, 30. Greatest depth, 32. 



Cawlyd— 20, 40, 60, 80, 100, 120, 140, 160, 180, 200. 220. Greatest depth, 222. 



Plate VIII. 

 Shows sections of the lakes on a scale of 6 inches to the mile 



TRANS. ROY. SOC. EDIN., VOL. XL. PART II. (NO. 20). 4 a 



PRE JB 



11DLC.I902 



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