PROCEERINGS OF GEOLOGICAL SOCIETIES. 
211 
stone, Coal-measurps, acd Permian sandstone in the Isle of Arran, at a point 
coincident witli the above-described protruded mass of Silurian rock, ten miles 
distant ; and he pointed out that the axes of the successive movements of pala'ozoie 
rocks of Scothind appeared to correspond with this and with each other, in having 
an E.N.E. strike. 
2. " On the Rock -basins in the Granite of Dartmoor." By G. \V. Ormerod, E.^q., 
M.A., F.G.S. 
The district examined by the author may be regai-ded as a central belt of this 
granitic district, occupying about one-third of Dartmoor, and e.ictending over the 
parishes of (ridleigb, Chagford, .Morton llampstead. North Bovey, Withycombe in 
the -Moor, Manaton, Ilington, and Bridford. Mr. Ornierod has examined most of 
therock-basinsoccurringinthisdistrictliimself.and madeplans of them from niesi^ure- 
ment. In describing tbem, he divided the district into plots, by rivers and water- 
sheds ; and he gave a slight notice of each tor, if it possessed any features of 
interest. He also stated the measurements of the basinj from N. to S. and from 
E. to W., for comparison ; as well as their characters, depths, &c., and the direction 
of their longest diameter. Vixen Tor, Mis Tor, Hounter Tor, the Tolmen, Kestor 
Rock, thePuckie Stone, Middlcton Hill, the Logan Stone, Hell Tor, Ingstone Rock, 
and Yes Tor were more especially described ; and the heights above the sea-level — 
the presence or ab.senee of basins on the tors — and the relative shapes and sizes of 
the b isins were s'lown by tables. 
After observing that though prubnbly in some cases used by the " Druids, " yet 
the 1):isins were certainly not formed artificially, Mr. Omierod proceeded to explain 
the diflerences between t lie "rock-basins" of the tors, the "potholes" in the 
granite of the bed of the Teign ; and to show that atmospheric causes aloue had 
caused the formation of the former ; he further pointed out the peculiar kinds of 
granite that were liable to be so decomposed as to present either saucer- shaped, 
flat- bottomed, or other shaped basins on the surface. 
3. "On the Kelloways Rock of the Yorkshire Coast."' By J. Leckcnby, Esq. 
Communicated by J. Morris, Esq , F.G.S. 
The author traced this interesting deposit from a short distance to the south of 
Gristliorpe Bay, where it is a very thin pisolitic band, to Red Clitt', where it 
presents upwards of 20 feet of sandstones, the upper part being fossilifcrous. At 
other points also near Scarborough Pier, at the C;i.stle, and inland at Oliver's Mount, 
the Kelloways Rock has been found to yield numerous fc^ssils, a list of which the 
author appended, together with descriptions cf some new or little-known sptcics 
of Ammonites from this deposit. 
[This paper was illustrated by a series of fossils from Mr. Lcckenby's 
Collection.] 
April 14. — 1. " On the occurrence of G raphuhiria Wcthercllii in nodules 
from the London Clay and the Crag." By N. T. Wetherell Esq., M.R.C.S. Com- 
municated by the President. 
The author, having briefly explained the form and general characters of the 
Pennatula-like fossil named GrajJiiihiria Wetlu nZ/ii hy MM. Milne-Edwaids and 
Haimc, described the circumslaucis under which he had lately found portions of 
the stem of this coral traversing nodules in the London Cl.iy of Iligb^ate. The 
nodules are of v.irious sizes, ::nd vary from a cylindrical to an ovoidal shape. 
Mr. NVethercll having also observed uuniistakcable fragments of the same 
Graphular'ta holding the same relative position in nodules from the Red Crag, 
diflering from those of the London Clay only in having been more rounded and 
polished by aqueous action, brought the subject before the Society as a link in the 
chain of evidence of the so-called " coprolitic " or pbosphatic nodules of the Red 
Crag having been to a great extent derived from the destruction of the Londcn 
Clay 'I'he author also offered some observations on the structure of other nodular 
bodies in the London Clay and in other deposits. 
'2. '• On the Extraneous Fossils of the Red Crag." By S. V. Wood, Esq., 
F.G.S. 
