Yorkshire Naturalists’ Union: Annual Report, 1912. 87 
done that it is intended to hold special field meetings of the 
Jurassic flora Committee during the coming session. 
GLACIAL COMMITTEE.—Mr. J. W. Stather writes :—Within 
the Jast few months I have received a collection of boulders 
and pebbles from the Dogger Bank, dredged by Hull trawlers, 
about 150 miles east of Coquet Island, off the Northumberland 
coast. 
The large boulders consist for the most part of crystalline 
rocks, schists, gneiss, quartzites, quartz-porphyries, etc., 
while among the pebbles are two or three varieties of fine- 
grained granites, porphyrites, basalts, and black flints. 
As to the original source of these rocks we are unable to 
say anything with certainty at present, as few (if any) of them 
belong to types with which we are familar in East Yorkshire ; 
but we hope to be able to locate at least some of them in the 
near future. 
Mr. Thos. Sheppard writes :—Running parallel with the 
north shore of the Humber estuary a little to the east of the 
mouth of the River Hull, and at some distance from the shore, 
is a long submerged bank which considerably interferes with 
shipping, known as the ‘ Hebbles’. 
A litle while ago it was decided that this should be removed, 
and powerful dredgers were used. The material excavated has 
been transfered to another part of the estuary, and from an 
examination of this, it is apparent that the bank instead of being 
an ordinary sand or mud bank, as was suspected, turned out 
to be of solid boulder clay. The boulders consisted of Car- 
boniferous Limestone, Liassic and Oolitic fragments and fossils, 
Chalk, Basalts, Red Ganites, etc., many of which are well 
striated. From the boulders and the clay it is apparent that 
the Bank consists of the Middle Boulder Clay. Through the 
kindness of Mr. A. E. Butterfield, of the Humber Conservancy, 
we have been able to acquire a good selection of the boulders. 
OTHER COMMITTEES, ETC. 
MiIcro-ZOOLOGY AND Micro-BoTaANny ©COMMITTEE.—Mr. 
J. W. H.. Johnson, B.Sc., writes :—This section regrets to 
record the death of Mr. R. H: Philip, of Hull, one of its oldest 
and most active workers ; and ‘there is now greater need than 
ever of additional assistance in this branch. 
The localities and conditions prevailing during the York- 
shire Naturalists’ Union Excursions have not favoured any 
large addition to the previous records; but the ecological 
factors concerned in the distribution of several species have 
been investigated. 
1913 Jan. 1. 
