THE POST-PLIOCENE NON-MARINE MOLLUSCA OF ESSEX. 91
CANNING TOWN.
For our knowledge of this undescribed deposit we are
entirely indebted to Dr. Frank Corner who collected extensively
from it during its short exposure. The shells were found in
layers alternating with mud and peat during the excavation
of the sewer from Canning Town to Stratford, south of the
railway bridge. Associated with them were bones of a small
ox, deer, wolf, beaver, and whale, with a chipped flint celt (all
of which are now in the magnificent collection of Dr. Corner).
The species are thirty-two in number, and in all probability are
of the same age as the Lea Valley examples to be described
later. A series from this locality is now on view at the Natural
History Museum.
LEA VALLEY.
On either side of the Lea River, between Walthamstow and
Clapton, there is a series of peaty and marly alluvial deposits
full of molluscan and vertebrate remains. During the construc-
tion of the reservoirs of the East London Waterworks Company
at the former locality extensive sections were exposed, and these
were described by Dr. H. Woodward (15) and a list of the
mollusca was given. In 1890, after a careful examination of the
original materials, Mr. B. B. Woodward published a list of
forty species (31). Dr. Frank Corner kindly placed at our
disposal a series of shells found by himself in August, 1894, in
alluvium about eight feet from the surface at New Park, near
White House, Lea Marshes, associated with wooden pin and
neolithic flakes. The species are thirty-four in number and are
listed with the Walthamstow examples as they came from the
same series of beds. There are, however, ten species not
hitherto recorded, viz.:—
Agriolimax agrestis Planorbis carinatus
Vitrea cellaria Vivipara contecta
Helicella caperata ,, vivipara
Helix aspersa Anodonta cygnaea
Succinea elegans Pisidium, pusillum.
Later on Dr. Corner sent us a further collection from the same
series of beds recently exposed in excavation for a new
reservoir and from this was obtained three more new records,
viz : Vitrea fulva, Physa hypnorum, and Velletia lacustris.