232 lamplugh: larger boulders of flamborough head. 
The classiticatioii of these boulders yields the following result : — 
2. boulders in the DANES DYKE VALLEY. 
Per centum. 
25 Limestones, undoubtedly of Carboniferous age 17 "6 
5 Sandstones, undoubtedly of Carboniferous age ... 3*5 
7 Limestones, origin unproved, but either Magnesian 
or Carboniferous ... ... .. 5*0 
31 Sandstones and Grits, origin unproved, but sus- 
pected to be Carboniferous ... ... 2 r8 
2 Pebbly quartzite and conglomerate : undoubtedly 
Primary rocks ... .... ... . . 1 "4 
1 Limestone derived from the Lias ... ... Of 7 
62 Basaltic rocks ... ... ... . . 43 '7 
2 Fragmental volcanic rocks ... ... ... 1*4 
2 Schistose and Metamorphic rocks ... ... 1'4 
5 Granitic rocks .. ... .. ... 3 '5 
142 100-0 
Before discussing these resndts, I will give the details of the 
third part of my paper. 
PART III. THE SHORE BETWEEN DANES DYKE AND THE 
FLAMBOROUGH SOUTH SEA LANDING. 
In this case the list is a direct continuation of that given in 
Part I., and nearly all the boulders observed lay upon the shore 
between high and low water-marks, whither they have fallen through 
the erosion of the thick capping of drift which overlies the cliffs of 
chalk. The cartmen have commenced their raids upon them, and 
will in time remove all that are movable. 
My list contains 110 Boulders, consisting of the following- 
rocks : — 
3. BOULDERS BETW^EEN DANES DYKE AND SOUTH SEA LANDING. 
per cent. 
20 Limestones, undoubtedly of Carboniferous age ... 18*2 
8 Sandstones and Grits, undoubtedly of Carbon- 
iferous age ... ... ... ... 7*3 
