90 Reports and Proceedings. 



In this paper the author brought forward the eA^dence which 

 seems to him to establish the existence in the southern part of the 

 Lake-district of a " valley-ignoring and ridge-concealing ice-sheet." 

 With regard to ice-marks, he distinguished between primary striae 

 and those produced at a subsequent period, and stated that in the 

 Lake-district the direction of the primary striee generally coincides 

 with that of the action by which rocJies moutonnees have been pro- 

 duced. He gave a table of the direction of ice-marks observed by 

 him in the district under notice, and stated that about Windermere 

 and Ambleside the general direction is nearly N.N.W., round Gras- 

 mere between N.W. and N.N.W., north-west and west of Grasmere 

 in upland valleys and on high ridges about N. 30° W., south of Gras- 

 mere and in Great Langdale N. 35° W., and in the Coniston district 

 a little W. of N. In many places he recognized an uphill march 

 of the ice. He thought that the iceflow producing these marks 

 might be anterior to the flow from south to north, of which traces 

 are observed in the northern part of the Lake-district, and that 

 its source was probably a vast mass of ice covering many square 

 miles of country north of Far Easdale. The author also referred to 

 the glaciation of North Wales, some of the marks of which, observed 

 by him in a district south of Snowdon, seemed to him to indicate the 

 southerly movement of a great ice-sheet capable of ignoring or 

 crossing deep valleys. He noticed that towards the top of the pass 

 of Llanberis there is a thin covering of drift on the S.W. side, 

 resembling the gravelly pinnel of the Lake-district. He also men- 

 tioned the occurrence near Llyn Llydan of numerous mounds 

 composed of clay, sand, and fine gravel, the stones having generally 

 been rolled by water, and ascribed their formation to a combination 

 of glacial and marine actions. 



Discussion. — Mr. Ward was inclined to regard the scratches in the Lake-dis- 

 trict described as due to the confluence of several glaciers, so as to form a large 

 mass of ice, the pressure of which enabled it to travel over the ridges separating 

 the valleys, especially at their lower ends. If the phenomena could be explained 

 in this manner, he thought it needless to invoke the existence of a large general 

 ice-sheet. If such a thing had existed, it must have brought some of the rocks 

 from the north and deposited them in the district, and this was not the case. 



Mr. D. C. Davies thought that the author had left some circumstances out of 

 view, especially the difference of dates of the striae on the Welsh mountains, 

 which had been cut at different times during the elevation and depressions of the 

 land. He instanced the occurrence of fragments of Scotch granite in gravels at an 

 elevation of from 1 500 to 2000 feet above the sea. 



The Chairman observed that some years ago he had attempted to show that 

 Anglesea had been glaciated by ice that had come from the north in the Cumber- 

 land district, and attributed this circumstance to the preponderance of this northern 

 ice over that from the Snowdon range, which was, as it were, set aside by it. He 

 was inclined to think that the Menai Straits, the direction of which coincided with 

 the main lines of glaciation in Anglesea, might be due to the same cause. 



3. Notes on some Lamellibranchs from the Budleigh Salterton 

 Pebbles." By Arthur Wyatt Edgell, Esq., F.G.S. 



In this paper the author commenced by noticing the accordance 

 between many of the pebbles of Budleigh Salterton and beds occur- 

 ring on the opposite side of the Channel in Brittany, and then ' 

 described several species of Lamellibranchiata found in the Budleigh 



