O+ A VOYAGE OF DISCOVERY 
which they were most abundant were to be selected, 
hand-specimens might have been obtained in which 
there were dozens. ‘They were all, or at least all 
those that I remembered having seen, of the bi- 
valve kind, and appeared to consist chiefly of va- 
rieties of the Venus genus. . 
In that part of the rock which was washed by the 
sea, I observed some horizontal strata of beautiful 
white marble; and I saw several loose pieces of it 
amongst the debris of the rocks that overhang the 
shore. ‘These rocks, at the place where we landed, 
rose to the height, I should imagine, of between three 
and four hundred feet above the level of the sea; 
but, from the quantity of rubbish that fell from 
them, the only part of their surface that could be 
seen, was about twenty feet of their base, where 
these mouldering remains were washed away by the 
sea, and from sixty to eighty feet of the top of them, 
from which the fragments in question-fell. Their 
surface, both at their top and base, was stratified. 
The strata at the base appeared to be horizontal ; but 
those at the top seemed to dip a little to the west- 
ward, —a thing that I observed, indeed, in all the 
rocks that form this coast to the eastward. And, 
from other similarities of appearance between the part 
of the coast on which we landed this afternoon, and 
that to the eastward, I have little doubt but all 
of it is composed of limestone. Now, to conclude 
the remarks that I have been enabled to make during 
our visit on shore to-day, I have only to add one 
circumstance, which, I must confess, I feel less plea- 
sure in relating, than any other of the occurrences 
of the day: it is, that we found the ebb-tide come 
15 
