ON THE CRYSTALLINE ROCKS OF ANGLESEY. 169 
necessary to add any more, though the granite itself and the basic 
gneiss should be analysed if possible. ‘Partial analyses of a number 
of the dykes, to which a few more should be added in order to compare 
dykes of different groups. A series from the Carboniferous limestone, 
which may be regarded as sufficient. The principal rocks of the Ser- 
pentine-Gabbro complex have now been done, but tremolitic and other 
exceptional rocks of that complex should be added. The important 
groups of the jaspers and pillowy diabases are now nearly finished. 
But of the schists into which they are believed to pass only one or two 
have been analysed, and as difference of opinion still exists concerning 
the origin of some of these, and as they are widespread types, the 
question is an important one. ‘This, indeed, is the most important 
research yet remaining from the chemical point of view, and Mr. 
Hughes is preparing to go on with, it. Even when that and some 
miscellaneous rocks of exceptional interest have been dealt with, large 
groups, particularly in the Holyhead and northern region of the island, 
will still remain, and it may not be possible to deal with these. 
The Secretary hopes to complete the map in about a year, and 
detailed written descriptions in perhaps eighteen months after that, 
and while this work is proceeding Mr. Hughes intends to go on with 
the analyses as indicated. 
There is scarcely any wear and tear of apparatus, the average annual 
expenditure is under 1/. A small grant to cover this for, say, the 
three years remaining is asked for. 
The Committee therefore ask to be reappointed, and to replace the 
late Mr. Lomas it is proposed to appoint Dr. John Horne, F.R.S., the 
Assistant Director of the Geological Survey of Scotland. Dr. Horne 
paid an (official) visit of a week to the Secretary last autumn, has taken 
unremitting interest in the work since then, and is willing to serve 
on this Committee. 
Irratic Blocks of the British Isles —Ieport of the Committee, con- 
sisting of Mr. R. H. TippEMAN (Chairman), Dr. A. R. DWERRYHOUSE 
(Secretary), Dr. 'T. G. Bonnry, Mr. F. M. Bourton, Mr. F. W. 
Harmer, Rev. S. N. Harrison, Dr. J. Horne, Professor W. J. 
Souuas, and Messrs. J. W. SratHerR and W. 'T. Tucker. 
Reported by Mr. A. C. Daron. 
From the neighbourhood of Scunthorpe, in Lincolnshire :— 
1 specimen of Elolite Syenite, Norway. 
4 specimens Andesite from Lake District. 
I specimen Andesitic Ash, Lake District. 
1 = Andesitic Breccia, Lake District. 
1 ay Fine-grained grit (Silurian), South of Scotland. 
l xy Porphyrite, Cheviot District. 
1 > Hard Chalk, Yorkshire. 
