224 BRITISH ASSOCIATION, &C. 



it split with a smooth conchoidal fracture, a series of blows was administered 

 from the '^;flat surface, at intervals round the margin, so as to peel off the 

 rough coating of the nodule on three sides. The second series of blows 

 produced the largest flakes, and a third, or even a fourth set of flakes would 

 successively be obtained in this manner before the core was used up. This 

 peculiarity was incidentally noticed by me about two years ago, in the course 

 of a communication to the society of antiquaries, and a subsequent, examina- 

 tion of many hundred flakes and cores has served to prove that the same 

 process was in use throughout the whole of this district. The largest flakes 

 hitherto found in North Devon are about three inches in length, but between 

 these and the smallest, which measure not more than three parts of an inch, 

 there are innumerable gradations in size. The result of the principal ex- 

 cavations which have been made at Croyde and Northam shows that the 

 average proportion of cores to flakes is about fourteen per cent. — Sir John 

 Lubbock did not see that there was any difference in the formation of the 

 flakes found in North Devon and those found in other parts of the country. 



Notes on Bbachiopoda obtained f^om the Pebble-bed of Budleigh 

 Salteeton. 



The Author, Mr. T. Davidson, F.E.S., stated that he had examined the 

 specimens forwarded to him by Mr. Vicary and others. None of the rocks 

 known to occur in England presented such a fauna, although in Normandy 

 we have a bed of Silurian rock extant containing the same. Mr. Davidson 

 could not account for the extraordinary mixture of Devonian and Silurian 

 forms, except by supposing that some old land had been broken up. There 

 were ten Silurian, ten Devonian, and fifteen undescribed species of brach- 



iopoda. Mr. Salter was of opinion that when these " pebble beds " were 



formed there was no break between England and Normandy. The fossils 

 were derived from rocks which occur nowhere else than in Normandy. — Mr. 

 Davidson thought that at least one-half of the fossils found in the pebbles 

 had been derived from local sources. — Mr. Godwin-Austen said that Lower 

 Silurian fossils were found on the south coast of Cornwall. — Mr. Pattison 

 thought that the remarks which had been made, only bore out the theory of 

 Mr. Godwin- Austen, that a reef of palseozoic rocks had formerly stretched 

 across what is now the English Channel. — Mr. Etheeidge pointed out that 

 the Budleigh pebble-bed lay on the triassa of Teignmouth, and thought that 

 the pebbles had come from Normandy. — Mr. Pengelly having found pebbles 

 on the sea coast at a place distant from Budleigh Salterton of the same kind 

 as those at Budleigh, he walked up the country about half a mile, and there 

 found the same in situ — a quartz bed containing fossils which he was not 

 without a degree of belief might have furnished some of the beds at Budleigh. 

 He thought the pebbles of Budleigh must have travelled a long distance on 

 account of their round form and high polish. 



netherton, pkintek, teubo. 



