128 Geological Society. 
This rock occurs as filling an old volcanic “ neck” which pierces 
through the Chalk limestone and the overlying sheets of basaltic 
lava which form the crest of Scalot Hill. The rock is seen to be 
rich in olivine, which forms perhaps one third of the whole mass 
and polarizes vividly. The other minerals are augite, labradorite, 
felspar in long plates or prisms, and a little black magnetite. 
The rock itself is found to be magnetic when tested by a sensitive 
needle. 
In its general characters the rock agrees with those of other vol- 
canic necks of co. Antrim, such as Carmony Hill and Sleamish, in 
being rich in olivine, and as having undergone very little alteration 
since the original consolidation. 
Section of Rock from the Summit of Mount Cooke, in New Zealand, 
obtained by Rev. W.S Green.—Prof. Valentine Ball showed a section 
of the foregoing. 
In its microscopic characters this rock appeared to consist of a 
breccia of voleanic materials, angular fragments of quartz and felspar 
being scattered about in a partly altered, either augitic or horn- 
blendic matrix. This view of its constitution has been confirmed by 
the microscopic examination of a thin section*. It is a distinctly 
clastic rock, of which the constituents have been so fractured that 
there are no unbroken crystalline forms in a condition suitable for 
determination. The angularity of the particles is against its being 
of a detrital nature. It would therefore be probably proper to de- 
scribe it as a dioritic-ash breccia containing quartz. 
GEOLOGICAL SOCIETY. 
June 20, 1883.—J. W. Hulke, Esq., F.RB.S., 
President, in the Chair. 
The following communications were read :— 
1. “On the Discovery of Ovibos moschatus in the Forest-bed, and 
its Range in Space and Time.” By Prof. W. Boyd Dawkins, M.A., 
BRS. E.G.S. 
The specimen described by the author formed part of the col- 
lection of the late Rey. F. Buxton, and was obtained by a fisherman 
from the forest-bed of Trimingham, four miles from Cromer. The 
edges are sharp, and the red matrix adhered in places, so that the 
author regards its geological position as satisfactorily established. 
It is the posterior half of the upper surface of the skull of an adult 
female Ovibos moschatus. The author describes the range in space 
and time of this animal, mentioning the different instances in which 
its remains have been found in Britain. These are, in some cases, 
* Prepared by Mr. Cuttell. 
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