Geological Society of London. 137 
Fairford, Gloncestershire. They occur in a white marly clay, occurring 
between the Forest Marble and the Cornbrash. A detailed section 
was given, and the particulars of some other coralliferous beds. These, 
the author showed, are not all upon the same horizon, though there is 
a considerable relation between their coral faunas. The author gave 
a description of twenty genera and thirty-four species. Of these the 
following genera are new to the British Oolites: Bathycenia, a new 
group of the family Astreide (Zusmiline), containing two species ; 
Favia, Astrocenia, Enallohelia, and Trycycloseris are for the first time 
recorded as occurring in the British Oolites; and Confusastrea and 
Oroserts, recorded by the author from the Inferior Oolite, are now added 
to the coral-fauna of the Great Oolite. The latter part of the paper 
consisted of an elaborate description of the genera and species. 
III.—February 7, 1883.—J. W. Hulke, Esq., F.R.S., President, in 
the Chair.—The following communications were read :— 
1. “On the Metamorphic and Overlying Rocks in parts of Ross and 
Inverness shires.” By Henry Hicks, M.D., F.G.S. With Petrological 
Notes by Prof. T. G. Bonney, M.A., F.R.S., Sec. G.S. 
In this paper the author described numerous sections which have 
been examined by him in three separate visits made to the north-west 
Highlands. In some previous papers, sections in the neighbourhood of 
Loch Maree had been chiefly referred to. Those now described are to 
the south and south-east of that area, and occur in the neighbourhoods 
of Achmashellach, Strathearron, Lock Carron, Loch Kishorn, Attadale, 
Strome Ferry, Loch Alsh, and in the more central areas about Loch 
Shiel and Loch Eil to the Caledonian Canal. 
In these examinations the author paid special attention to the 
stratigraphical evidence, to see whether there were any indications 
which could in any way be relied upon to prove the theory propounded 
by Sir R. Murchison that in these areas fossiliferous Lower Silurian rocks 
dip under thousands of feet of the highly crystalline schists which 
form the mountains in the more central areas. On careful examination 
he found that in consequence of frequent dislocations in the strata, the 
newer rocks were frequently made to appear to dip under the highly 
crystalline series to the east, though in reality the appearance in each 
case was easily seen to be due to accidental causes. Evidences of dis- 
location along this line were most marked; and the same rocks, in con- 
sequence, were seldom found brought together. He recognized in 
these eastern areas at least two great groups of crystalline schists 
metamorphosed throughout in all the districts examined, even when 
regularly bedded and not disturbed or contorted ; and they have repre- 
sentatives in the western areas, among the Hebridean series, which 
cannot in any way be differentiated from them. These he called locally 
by the names, in descending order, of Ben-Fyn and Loch-Shiel series. 
The former consist, in their upper part, of silvery mica-schists and 
gneisses, with white felspar and quartz; in their lower part, of horn- 
blendic rocks, with bands of pink felspar and quartz, and of chloritic 
and epidotic rocks and schists. ‘The Loch-Shiel series consists chiefly 
of massive granitoid gneisses and hornblendic and black mica-schists. 
Thirty-three microscopical sections of the crystalline schists and the 
