NOTES ON A POST-TERTIARY DEPOSIT IN 
SUSSEX. 
By Alfred Bell. 
For some years past the writer lias been working upon the 
Pliocene and later deposits of the British Islands, and in 
doing so it occurred to him that by correllating the faunas 
yielded by each locality, these might be grouped so that in 
some measure a slight idea of the changes in the relations of 
land and water might be obtained, or some indications of 
the successive stages whereby the British Islands assumed 
their present outlines arrived at. Some of the conclusions 
arrived at have been already published (“ Sequence of the later 
Tertiaries in Great Britain,” Geological Magazine, February, 
1886), but it was not till after the writer had worked out the 
materials obtained during a personal examination of the 
several deposits on the east coast of Ireland from the earlier 
Wexford gravels to the latest deposits on the Antrim coast 
(Rep. Brit. Ass., 1887-1890), that these ideas assumed a more 
definite shape. 
These views were further strengthened after examination 
of the fossils from the Pliocene deposits in the St. Ertli Valley, 
Cornwall. It had been already noticed that the fauna in respect 
to extinct species came nearer to that of the older or lowest part 
of the well known Crag deposits at Walton-on-the-Naze than 
to any other horizon. Inasmuch as some of these extinct forms 
are also present in the Irish deposits in counties Wexford and 
Dublin, and in the Isle of Man, it is evident that some line of 
water-way must have been existent at some time by which 
these species could have travelled in such opposite directions as 
the North Sea and the Irish Channel. 
It may be noted here, before passing on to the immediate 
subject of this paper, that the so-called Lower, Middle and 
Upper drifts of the Irish coasts, have nothing in common with 
the more recent Lower, Middle, and Upper Boulder Clays of 
the N.W. of England and Wales. This I hope to demonstrate 
at a future time. 
