AND EIVER VALLEYS BORDEEING THE BRITISH ISLES. 323 



deposits in the " Hurd Deep." It is true the " Hurd Deep " does 

 lie in the line of the current, and therefore, on the ground he 

 states, it would be protected against the deposition of the mud. 

 We all know the tremendous tidal currents that rush up and down 

 this channel, that rise and fall something like 60 feet, I think, on 

 the coast of Prance, and the rush of waters on the banks is 

 tremendous and a great danger to navigation. Therefore, when 

 there is such a rush of water along the channel of this " Hurd 

 Deep," lying as it does in the line of the tidal stream, it is natural 

 that the sediment should not have had opportunity to subside and 

 thus fill up the old river channel. 

 The m.eeting was then adjourned. 



COMMUNICATIONS BECmVEB IN BEGAED TO THE 

 PRECEDING FAPEB. 



The Cavaliere W. P. Jervis, director of the Royal Industrial 

 Museum of Turin, writes July 13, 1898 : — I have been familiar 

 with the whole of the European bathometrical observations for 

 twelve years and have often spoken of them, but I never under- 

 stood the enigma until Professor Hull threw light on the matter, 

 and now I feel the importance of those facts which I had all 

 along looked upon as a mere cariosity. 



[Cavaliere Jervis has contributed some matter towards a further 

 consideration of the subject, and a communication has also been 

 received from a valued member, Mr. H. P. Malet, who dissents 

 from Professor Hull's view. These communications can only be 

 adequately dealt with later on.] 



z 2 



