52 OUR COMMON BRITISH FOSSILS. 



pyritized. From the base of the gorge, where these 

 fossils may be hammered out in abundance, we 

 gain a magnificent view of Windermere, set in its 

 rich framework of green woods, greener than arboreal 

 vegetation anywhere else in Great Britain ! The geo- 

 logical eye takes in the rounded rocks which lie out- 

 side the woody belt, and does not pass by the heaps 

 of morainic matter which frequently form the eastern 

 coast-line. Ice-action speaks forth plainly from every 

 part of this district. 



Of course, the Lower Silurian rocks, so well 

 developed in North Wales, are not in many places 

 bad Graptolite stores. In the easily identified black, 

 slaty shales which crop out in the railway cutting 

 near Conway station, and banks of the Seiont, near 

 Carnarvon, the young collector may find sufficient 

 to satisfy all his cravings. In various places around 

 Welshpool, as at Fflyrnwy, near Llanfair, the flag- 

 stones abound in Graptolites. The slate-quarries of 

 Llansantfraid, Denbighshire, are famous for them, and 

 the geological tourist may find Diplograptus pristis in 

 great numbers, associated with other familiar species. 

 In the black shales which crop out in many places 

 near Builth, and in the bed of the Wye, Dicellograptus 

 and Clhnacograpttis are in profusion. It will be seen, 

 therefore, that in South Wales, as well as the north 

 of the Principality, wherever the Lower Silurian 

 rocks are well developed, and especially where the 

 shales have a black, finely laminated appearance, 



