xxviii Proceedings. '^March nth, igoj. 



Dover, westward, as far as the loo-fathom line in tiie Atlantic, 

 which sweeps southwards from Scandinavia, off the west of 

 Ireland, into the Bay of Biscay. There were no physical barriers 

 to forbid the migration of the Machairodus, Mastodon, Elephas 

 meridionalis, and the rest, from central and southern France 

 into Britain. They could find their way freely from the valleys 

 of the Loire and Garonne, across the valley now occupied by 

 the English Channel, into England and, it may be added, 

 Ireland. Over this area the animals migrated in the Upper 

 Pleiocene age. The discovery of a few of them in Derbyshire 

 is to be looked upon as an indication of their former existence 

 over the whole of this area. It is also a striking example of the 

 great destruction of the surface which has taken place since that 

 time, and of the imperfection of the geological record. This 

 is the only cave in Europe which has yielded remains of the 

 remote Pleiocene age. 



The mammalian remains referred to in the paper were 

 exhibited to the meeting. 



