1896-97.] 349 



origin, ashes and tuffs having been found in considerable 

 quantity, and vesicular structure being often seen. The melting 

 up of the older rock by the molten granite seems to have 

 produced a curiously mixed rock on a regional scale. This is 

 described in the Geological Survey and elsewhere as Diorite, 

 and was supposed to have been of separate origin. It is also of 

 considerable interest to see the small capping of our familiar 

 basalt and chalk, showing what a gigantic amount of denudation 

 has gone on in geologically recent times in order to clear all 

 the basalt and most of the chalk from the great valleys on 

 either side of the mountain. The members were then free to 

 either ascend the mountain or explore the lake ; but the entire 

 party decided to climb, so a start was at once made, over fields 

 and by cart lanes, until the open heath was reached, investigating 

 each crag and exposure of the rock. The party gradually 

 reached the summit (1,623ft.), from which the view proved 

 somewhat disappointing owing to the heavy clouds covering 

 the sky. After a short rest, the descent was undertaken, passing 

 exposures of the mingled rock above referred to, and reaching 

 the road in time to take the cars again. Another drive brought 

 the members to the top of Carndaisy Glen which pleased every- 

 one by its beauty. The little stream has cut down through 

 gravels and sands until it now has got some way into the rock. 

 The sides of the gorge rise steeply, timbered on either hand, 

 while the carriage road runs down close by the stream. Leaving 

 the vehicles, the members scattered in pursuit of their various 

 avocations, the fungi being (though still early) especially 

 noticeable. The hedgehog mushroom (Hydnum repandum) 

 was in considerable quantity, as were several species of Russula, 

 Boletus, Amanita, Peziza, and several more, samples of many 

 being taken for future identification. Halfway down the glen 

 the surprising sight was seen of the stream rushing against the 

 steep bank, and, having cut through it, flowing at right angles 

 to its old course, now quite dry. This has been caused by a 

 second stream cutting its way from outside till its bed was lower 

 than the main one, thus when cut far enough back tapping the 



