574 



Correspondence, 



in your cnrrent number, says, "Mr. Jukes has described Glacial 

 Strise in Devonshire ; " referring, of course, to the letter by that 

 Geologist, which appeared ia the Geological Magazine in October, 

 1865. 



Being quite inclined to believe in " the existence of land-ice at 

 comparatively recent geological periods, even in the south of England," 

 and delighted at the prospect of a fact so confirmatory, I took an 

 early opportunity, in company with Mr. W. Vicary, F.G.S., of Exeter, 

 of visiting the valley of the Exe, for the purpose of carefully study- 

 ing the mouldings and strige alluded to. 



We found that, so far as it goes, Mr. Jukes' description is very 

 correct and, indeed, graphic ; but we found also that he could not 

 have seen anything like all the facts. In short, we were fully satis- 

 fied that the mouldings were not produced by any kind of ice action. 



Yours, &c., 



Wm. Pekgellt. 



ToEaTJAT, November 9,th, 1866. 



ICE-MARKS ON THE MENDIP HILLS. 

 To the Editor of fhe Geological Magazine. 



Sib, — ^While lately comparing the forms of cliffs and rocks among 

 the Mendip Hills with phenomena now produced by oceanic waves 

 and currents, I saw, in the midst of an assemblage of perforated 

 rocks, two stones, one of which (Fig. 1) did not seem altogether like 

 any rock-surface I have yet noticed on the sea-coast. This stone is 

 between two and three feet in diameter, and appears to be a looser 

 and somewhat displaced portion of the underlying Mountain-lime- 

 stone strata. 



Fig. 1. 



Fig. 2. 



The marks seem as if they had been forcibly grooved out in 

 the direction of the arrow by a cause preserving a nearly uniform 

 level and direction. The face of the stone . now dips in the 

 direction of the darker marks, which look like shallow cracks en- 

 larged by water. The spot is near the summit of the hill to the 

 north of Axbridge ; and from the Shute-shelf road several footpaths 

 lead to it through a wood. Considering the great interest ice-marks 



