410 



PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 10, 



Ursus spelseus 



ferox 



Gulo luscus 



Meles taxus 



Canis Tulpes 



lupus 



Hyana spelfea 



Cervus tarandus 



elaphus 



Bison priscus 



Hippopotamus major ., 



Equus caballus 



Rhinoceros hemitoechus 



tichorhinus 



Elephas antiquus 



Arvicola amphibia 









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From this list all reference to the series of prehistoric mammalia, 

 and to the traces of prehistoric man, has been omitted. 



DlSCFSSIOIT. 



Mr. Hfghes indicated the exact position in which the jaw of the 

 Glutton was found, but pointed out that, owing to the excavations of 

 keepers. Badgers, Babbits, &c., the earth was so much disturbed in 

 that part that it was impossible to be sure of the original relative 

 position of the bones. He showed that the Plas Heaton Cave was 

 on a hill rising from the top of the plateau, while the Cefn, Brysgill, 

 and Galtfaenan Caves were in the gorge cut through that plateau, 

 and therefore that the Plas Heaton Cave was probably formed, and 

 might possibly have been first occupied, at a much earlier period than 

 the others. As it appeared to pass under that part of the hUl which 

 is overlapped by heavy drift, he thought it quite possible that this 

 may have been a preglacial cave, and that by-and-by we may find 

 evidence of a preglacial fauna in it. 



The Kev. W. S. Sxmonds mentioned that in some of the pot-holes 

 in the roof of the Cefn cave he had procured silt containing remains 

 of shells determined by Mr. Jeffreys to be marine. 



Mr. Hughes explained that these shells had probably been washed 

 in from the superficial marine drift of the district. 



Mr. Dawkins, in reply, expressed his belief that though the ex- 

 cavation of the caves in question might have taken place at different 

 periods, yet that their occupation was, geologically speaking, con- 

 temporaneous. 



