EXPLANATION OF THE PLA.TES. XV 



Plate Page 



{Schists and Gneiss from British East Africa, ~| 

 illustrating Mr. J. Parkinson's paper on a I -„ , 

 Group of Metamorphosed Sediments situated j 

 between Machakos and Lake Magadi J 



TTT f T TTT f Ammonites from Jebel Zagiiuan, illustrating") -,„ 

 ijii a; L.111 1 Mr L R Spath . s paper on those f(jsgils J- wu 



fM.AP of Suffolk showing the River-Systems &) 



the Position of the Tor of the Chalk ; and j 



ttv « tvJ Contoured Maps of the Gipping, Brett, and ! rft1 



uiv ec Li -j UppER 8tour Valleys, illustrating Mr. P. G. r ' Jei 



| H. Boswell's paper on the Age of the Suffolk ■ 



[^ Valleys, etc ) 



/'Map of Borings, showing Contour-lines on the ) 

 j Palaeozoic Platform ; Map showing Contour- I 

 I lines in the Base of the Gault ; and Map j 

 A-C-{ showing the Contour-lines of the Palaeozoic \- lxx 

 Platform, corrected for post-Cretaceous I 

 ) Movements, illustrating Dr. A. Stratum's Presi- | 

 ^ dential Address I 



