324 Proceedings of the Royal Physical Society. 



few days, on the higher heughs between Knock Knowe and 

 Port Mona, in dense red tills and bouldeiy and tilly gravels 

 between the heights of 125 ft. and 350 ft., and more particu- 

 larly at about 125 ft, 225 ft., 275 ft., and 300 ft., I obtained 

 a number of well-wrought flint implements. The beds in 

 which these were found were certainly the products of in- 

 tensely glacial conditions. . Some of the implements ap- 

 parently resemble forms found in very ancient mammaliferous 

 cavern deposits as in Kent's Cavern and Brixham Cave, a 

 report of the discoveries in which last Mr Pengelly has kindly 

 forwarded me. These wrought flints may yet have to be 

 relegated to the earlier quarter of the ice age rather than to 

 the later beds in which they are now found distributed. The 

 cave fauna could never have existed at the time when these 

 boulders, gravels, and dense hard tills were left where they 

 are found. Either the cave implements, like them, are recent 

 in comparison with the mammals, or the higher stratified ones 

 on the west of the Ehins must have been fashioned in a 

 period antedating by over a quarter of a million of years 

 those implements that I have already relegated to the 

 glacial age. Some of the stratified implements found at the 

 Wild Cat Holes were in gravel that overlaid the broken 

 down caves. The same was the case with what seems the 

 remains of another high-level cave north of Port Mona, the 

 whole arch of the cave having been removed. These caves 

 may have been of the age of the glacial ingress, and have been 

 there when land stretched far to the west where, now, is the 

 deep sea. In that case they might contain remains of some 

 old dwellers who lived there before the sea rose hundreds of 

 feet over them, and left them bared again, but now on 

 the edges of frowning cliffs. Implements of different types 

 are also found on the high grounds separated by thick beds 

 of peat, and accompanied by teeth of somewhat distinct 

 groups of animals. Such an instance occurred at the Mull 

 where the lower implements and teeth were resting on sand 

 at the very bottom of the peatmoss. Eemains of difterent 

 species of deer are found in the deposits following the 100-ft. 

 series of sands and gravels. In these instances the different 

 relics become apparently mingled where the peat or alluvium 



