32 
YORKSHIRE NATURALISTS UNION. 
Glacial Committee. — The Secretaries write : — Some very 
interesting items are recorded by the members of the Hull Geo- 
logical Society in the East Riding, which will be more fully 
reported later. 
Messrs. C. H. Thompson and H. H. Denham have been work- 
ing the Holderness drifts on the sea-coast of Aldbro'. On the 
beach, about half tide, they found a mass of Speeton Clay boulclered 
in the purple drift, measuring roughly twelve feet by seven feet, 
and showing the lines of bedding still intact. 
It was full of iincntshed fossils, including Exogyra simiata, 
Bel. lateralis, Asiarte senecta, small lamellibranchs, and a large 
number of Ammonites. The fossils show that it belongs to the D4 
Division of the Speeton Clay (Lamplugh). This locality is thirty 
miles south of Speeton. 
At Mappleton, four miles north of Aldbro', Mr. J. W. Stather 
records a still larger mass of Speeton Clay, twelve yards by nine 
or ten yards, and containing many belemnites and ammonites. 
Mr. Stather also saw large masses of a blacker clay, with 
crushed ammonites, etc., which he thinks is Kimeridge Clay. 
Mr. T. Sheppard reports the finding of two separate pieces of 
black flint in the Holderness drifts,* in each of which is embedded 
a Belemnite {B. lanceolatus). This speces does not occur in the 
chalk of Yorkshire, though it is very commonly met with in the 
boulder clay and gravel ; where, also, blocks of black flint are 
found in plenty — a material also foreign to the Yorkshire chalk 
It would therefore appear that both the black flint and the 
Belemnite have probably been derived from an outcrop in the 
North Sea. 
Mr. Thompson has also collected Lias ammonites in large 
numbers in the locality of Aldbro'. All zones of the Lias are 
represented except the jamesoni zone. The nature of the matrix 
of the fossils differs very much from that of our North Yorkshire 
specimens. A lengthy list of Liassic Cephalopoda collected from 
the Holderness drift is being printed by the Hull Geological 
Society. 
There are further records from other directions, but nothing 
new. 
The following were elected for 1909 : — 
Chairman — P. F. Kendall, M.Sc, Rosedene, Weetwood, Leeds. 
Conveners — J. H. Howarth, J. P., Somerley, Halifax, and J. W. 
Stather, Newland Park, Hull. 
Representative on Executive — E. Hawkesworth, Leeds. 
* See "Naturalist," Oct. 1908, p. 320. 
