lUPPLE-MARKS IN SANDSTONE. 
^15 
the foot-marks of reptiles, and Crustacea, have been 
discovered on the surface of sandstone in some 
parts of England and Scotland, I examined the 
slabs in the quarries of Horsham with considerable 
attention, in the expectation that similar indications 
might be detected, but without success ; yet, as 
reptiles are known to have existed in vast numbers 
on the land and in the water, at the period of the 
deposition of tliese strata ; and as the surface of 
the stone exhibits proofs that it was dej)osited in 
shallow water, and was occasionally left dry, it is 
probable that, sooner or later, such impressions 
will be discovered. These observations were 
made during a visit to Stammerham quarry, near 
Horsham, in company with Mr. Lyell, in 1831. 
At Sedgwick, near Stammerham, large quan- 
tities of the thinner layers of sandstone, or grit, arc 
quarried for the purposes of paving, roofing, &c. ; 
this variety is sent to many parts of the county, and 
is distinguished by the name of Horsham-stone. 
The dip of the strata around Horsham and Tilgate 
Forest, is exceedingly variable ; the general in- 
clination is towards the S. E. ; but on the forest, 
according to the information of an intelligent old 
quarry man, the beds formerly worked there were 
found to be nearly horizontal over a considerable 
area, so as to render the drainage of the quarries 
very difficult. * 
In the westernmost portion of the Hastings beds. 
♦ In 1829, in a quarry near Rusper, bones of the extremities and 
several vertebrae of the Iguanodon were discovered ; and the latter are 
now in my collection, through the kindness and liberality of Tred- 
croft. Esq. of Horsham. 
P 1 
