828 Proceedings of the British Association, 



of chalk, which contain organic remains difFering in some respects 

 from those of the chalk iii situ. The town of Cromer seemed to 

 be built on an immense block of chalk, contained in the diluvial 

 formation. — Mr Murchison dissented from Mr Greenough's opinion. 

 He conceived the formation of chalk was under the diluvium, and 

 bad been elevated and disrupted. He had seen at Hazeborough 

 large platforms of chalk laid bare after a storm ; near that place 

 were needle-shaped rocks of chalk, and at Cromer the foundation 

 of the town must rest on part of the same mass. There were 

 strong reasons for believing tl^^ the Norfolk diluvium contained 

 recent shells only. Mr Lonsdale, on examination, could discover 

 no others. — Mr Charlesworth mentioned, that Dr Beck considered 

 the shells of the tertiary period to be extinct species, and that at 

 the formation of the Norfolk Crag the climate must have been very 

 cold, like the Arctic regions. He considered the diluvial formation 

 to have been sufficiently searched to warrant an opinion that it does 

 not contain the remains of the mastodon. . Many singular organic 

 remains have been found there, which have been transported, as of 

 saurians, which must have come from Yorkshire. In alluding to 

 the fact of shells similar to those of the Crag being found at Brid- 

 lington, he was informed by Mr Sedgwick that the formation at 

 that place was probably part of the Crag. 



A paper by Mr J. B. Bowman, was now read, on the Bone 

 Caves at Cefn, in Denbighshire. A description of these has been 

 already published in the Edinburgh New Philosophicat Journal, 

 The caves are in the carboniferous limestone. The roof of the lower 

 cave is covered with stalactites, which are often broken offer blunted. 

 The diluvium on the floor contains fragments of slate, and the upper 

 portion animal remains in great abundance. Among these are some 

 of a very minute size, and also elytra of beetles. A black matter 

 is also found, with veins of reddish clay. The bones are often in 

 fragments ; the teeth are somewhat worn ; sometimes the teeth are 

 of young animals, but no indentations have been found upon them. 

 No skulls have been discovered, nor any coprolites. The bones 

 frequently contain gelatine, and have often manganese upon them ; 

 hair was also discovered. The stalactites seem confined to the an- 

 terior part of the cave ; in the posterior part a fine sand is found. 



After this, a desultory conversation took place on the exhibition 

 of two rtiodels by Mr Ibbotson, one of the country round Neufcha- 

 tel, in Switzerland, on the scale of half an inch to the mile ; and the 



