334 BRACHIOPODA OF THE 



presence of marginal Trias sediments (Buntcr) here and there fringing the coasts, as at 

 Slapton, Thurlstone, and Mount Edgecombe, seems to indicate a rough coincidence 

 between the present cliff-line and that of the early Triassic sea. But I think on strati- 

 graphical evidence the Channel bed focusses most of the facts, although we cannot get at 

 it, and therefore naturally prefer a visible source." 



In a paper read to the Devonshire Association at Ilfracombe in July, 1878, 

 Mr. Pengelly says, when speaking of the Budleigh pebbles, that their rounded polished 

 state favours the idea that they had travelled long, and probably from far, and adds : — 

 " It has been suggested, and perhaps with great probability, that their source was none 

 of the foregoing localities [Normandy or the Dodrnan district], but a reef lying between 

 them, perhaps a once continuous barrier crossing the Channel and connecting the whole. 

 In short, by common consent, the pebbles came from somewhere about the south-west 

 of the Budleigh-Salterton pebble-bed. There was an open sea between the Atlantic 

 and what is now South-east Devonshire, and the transportation of material was in 

 that direction in Triassic times, as it was in the raised-beach area and is at present." 



Mr. Townshend Hall also observes, in an article in White's ' History of Devonshire/ 

 1878, that "The presence of Budleigh-Salterton pebbles may be accounted for, without 

 the necessity of the conclusion that they must have travelled from Normandy, on the 

 supposition that in pre-Triassic times reefs of Silurian and Devonian rocks extended south- 

 wards towards the coast of France over an area now occupied by the Channel, and that 

 the destruction of these afforded for a limited time the material from which the pebbles 

 had been derived." In this view I also concur. 



Quartzite pebbles, indentical in colour and mineral composition with those that 

 occur at Budleigh-Salterton, and containing some of the same fossils, have been found in 

 the Drift scattered over a considerable surface of England, as far as Birmingham. Thus, 

 for example, the Rev. P. B. Brodie many years ago found OrtJds Budleighetisis and 

 Lingula Lesueuri in quartzite pebbles in the Drift of Warwickshire. Mr. Harrison 

 picked up a similar pebble with 0. Budleighensis in the Chalky Boulder-clay of Counter- 

 thorp, at about five miles south of Leicester. Mr. Jennings records similar pebbles 

 with same fossil from Nottingham. Mr. Spencer G. Perceval found quartzite pebbles 

 identical in appearance with those that occur at Budleigh-Salterton with 0. Budleighensis, 

 and others with Spirifer Verneuilii, in the Drift at Sparbrook and Ladypool Lane, near 

 Moseley, Birmingham ; also at Hartborne, a locality south-west of Birmingham. These 

 pebbles were presented by Mr. Perceval to the Museum of Practical Geology in London, 

 where they can be seen. 



In the Woodwardian Museum, Cambridge, may likewise be seen a quartzite pebble with 

 Lingula Lesueuri, found by Mr. Houghton in the Drift of Ladypool Lane, near Birming- 

 ham. A quartzite pebble with Discina Vicaryi was also picked up by Mr. Vicary on 

 the Chesil Bank, all denoting how widely spread are similar pebbles to those accumulated 

 at Budleigh-Salterton and its neighbourhood. 



