136 Reports and Proceedings— 
Mr. Iddings from the Obsidian Cliff in the Yellowstone Park, and 
by Mr. Whitman Cross from the Silver Cliff, Colorado, are most 
admirably illustrated in these inclusions of the Cuilin Hills. It is 
interesting to note that the nuclei of some of these large spherulites 
consist of fragments of the micropegmatitic granite which have 
escaped fusion. Among the new minerals developed in these inclu- 
sions, by the action on them of the enveloping magma, are pyrites 
and fayalite (the iron-olivine). 
The phenomena now described are of interest as setting at rest 
all doubts as to the order of eruption of the several igneous masses 
of the Western Isles of Scotland. That the gabbros are younger 
than the granites was maintained by Macculloch in 1819, by J. D. 
Forbes in 1846, by Zirkel in 1871, and by the author in 1874. In 
1888, however, Sir A. Geikie asserted that these conclusions were 
erroneous; he insisted that the granites were erupted after the 
gabbros and basalts, and that they are, indeed, later than all the 
volcanic rocks of the district except a few basic dykes which are 
seen to traverse them. The occurrence of the remarkable inclusions 
of granite within the gabbro now removes all possibility of doubt 
on the subject, and proves conclusively that the granite was not 
only erupted but had consolidated in its present form before the 
outburst through it of the gabbro. 
2. “ Anthracite and Bituminous Coal-beds. An attempt to throw 
some light upon the manner in which Anthracite was formed ; or 
contributions towards the controversy regarding the Formation of 
Anthracite.” By W. 8. Gresley, F.G.S. 
The author does not seek to advance any new theory in this com- 
munication, nor to proclaim new facts of any importance, but to 
put old facts in something of a new light, in order to aid the inves- 
tigations of others. His main object is to establish two facts, viz. :— 
that the associated strata of anthracite-beds are more arenaceous 
than those containing so-called bituminous coal-beds, and that the 
prevailing colours of the sandstones, grits, etc., of anthracite regions 
are greyer and darker than those of regions of bituminous coal. To 
these facts may perhaps be added a third, that the more anthracitic 
the coal-beds, and the more siliceous the enclosing strata, the harder 
and tougher these associated strata are. 
While recognizing that the rocks of many anthracite regions have 
undergone great disturbance, he cites other areas where coal-basins 
have been much folded, without any corresponding production of 
anthracite in considerable quantity. 
The modes of occurrence of anthracite are illustrated by many 
instances observed by the author in the Old and New Worlds. 
II.—February 8th, 1893.—W. H. Hudleston, Esq., M.A., F.R.S., 
President, in the Chair. The following communications were read : 
1. “ Notes on some Coast-Sections at the Lizard.” By Howard 
Fox, Esq., F.G.S., and J. J. H. Teall, Hsq., M.A., F.R.S., F.G.S. 
In the first part of the paper the authors describe a small portion 
of the west coast near Ogo Dour, where hornblende-schist and 
serpentine are exposed. As a result of the detailed mapping of the 
