164 THE STORY OF THE EARTH. 



genus which survives in the West Indies, and the 

 tilus Sowerbiiy a species met with in the Lon- 

 don clay, but most of the other fossils are of 

 such genera as occur upon the British shores at 



Woo /wick &*ds 



E. W. 



Fig. 34. — Cliff section of the Lower Tertiary Strata; east of Heme 



Hay in Kent. 



the present day. The commonest are species 

 of Cyprina which resemble the living Cypriana 

 IslanJica. The sands are nowhere consolidated ; 

 usually of a yellow colour, almost free from any 

 mixture of pebbles, but sometimes yielding, in 

 the ea>t of Kent, a few rounded Hints which show 

 that the chalk had begun to be denuded, and con- 

 tributed some particles to the crystalline grains 

 of quartz which form the sand. Under the name 

 Landenien inferieur, the Thanet Sands are traced 

 into Belgium, being well seen about Bruss< 

 They are also traced into France by way of 

 I i:s, but it is not certain that they extend into 



the Paris basin. The land surface which occurs 



Lifege, makes known a la 

 1 similar in sonic respects to that of \i\, with 

 oakv like those <>f the mountain districts of \ 

 with laurels, willow, ivy, and other familiar types 

 f \ ■ 1 n . 



Ab< '• beds SUCCeed the Woolwich and 



Rca< IS 25 feel in cast Kent and 90 feet 



under London. They are the upper Landenien 



of B< and the north of France, sometimes 



