280 NOTES ON ESSEX GEOLOGY.
smaller Mammalia is most praiseworthy, treated of "British
Fossil Shrews."35 He records one specimen from the brickearth
of Grays, but refrains from naming it : it had previously passed
as Sorex vulgaris (p. 533). The new species (Neomys browni)
also comes from Grays, and is known only from there, (p. 535.)
1912.
The Rev. E. Hill's paper on "Glacial Sections around Sud-
bury,"36 deals with Essex as well as with Suffolk, as Ballingdon,
on the right side of the Stour opposite Sudbury, is in our county,
and is referred to on pp. 24, 26, 27. The author concludes that
the Stour Valley is pre-Glacial, that a great mass of Boulder
Clay has been removed, and that some of the low lying masses
of Boulder Clay, which are in peculiar positions, were not formed
in place, but "are as much boulders as any mass in the gravel ;
plainly they have been transported." All of them are below
the level of the base of the great mass of Boulder Clay and are
on the slopes of the valley and "clay can slip clown very
moderate slopes."
When, long ago, I first saw and recorded many of these most
interesting sections (the finest set of inland sections of Glacial
Drift that I have seen), I was greatly puzzled by them, and
was disposed to regard these anomalous beds as belonging
to the Lower Glacial of Wood. Mr. Hills' ingenious explanation
is accepted by P. G. Boswell, who is working so well at East
Anglian geology ; but I think that the question can hardly be
looked on as definitely settled ; the infilling of our deep channels
of Glacial Drift consists of other materials besides Boulder Clay.
S. H, Warren's paper on a Late Glacial Stage in the Valley
of the Lee (with its various appendices by other authors) is
based on sections just over the border, in Middlesex,37 and does
not deal specifically with Essex. Though therefore I may spare
myself from noticing it, I am bound to add that no geologist
has any business to deal with the valley that forms the border
of our county without studying this elaborate work of our new
President.
In this year there was a correspondence on the subject of
35 Geol. Mag., dec. v., Vol. viii., p. 529, etc.
36 Quart. Journ. Geol. Soc., Vol. lxviii., p. 23.
37 Quart. Journ. Geol. Soc., Vol. lxviii., pp. 213-251.