ANOTHER POSSIBLE CAUSE OP THE GLACIAL EPOCH. 157 



Colonel Feilden also inquires whether there is any proot 

 that the glaciation of North America was coincident with the 

 Glacial epoch of Europe ? 



My reply is, that although there may be no proof, the 

 probabilities are in favour of the view, as the uplift of the 

 land and ocean bed seem to correspond on both sides of the 

 Atlantic, as I have endeavoured to show. But it is other- 

 wise with the western side of the American continent, where 

 reciprocal (not simultaneous) conditions appear to have pre- 

 vailed, as Professor iSpencer has recently shown, in his paper 

 on the " Oceanic connection of the Gulf of Mexico with the 

 Pacific" (Bull. Geol. Soc, Amer., vol. ix, 1897). 



The Chairman (the Ven. R. Thornton, D.D., Y.P., Ai-chdeacon 

 of Middlesex), having conveyed the thanks of the meeting to 

 Professor Hull, a discussion on some technical points took place. 



COMMUNICATIONS RECEIVED IN BEGABD TO THE 

 PRECEDING PAPER. 



Professor T. Rupert Jones,* F.R.S., writes : — 



January Ibth, 1898. 



I have read Professor Hull's paper with much pleasure. Ho 

 seems to establish the following facts and conclusions. 



If we trace the 100-fathom line around the British Islands, as 



* Professor Rupert Jones and Mr. Upham's communications were 

 received in time to be read at the Meeting. 



