504 



THE GEOLOGIST. 



that I believe to be subsidence, and surely the unhcaval of lands is not more 

 extraordinary than their depression ; at all events, both phenomena have 

 repeatedly occurred on a very large scale, and in conclusion I thankfully shelter 

 my opinion behind the strong shield of Sir Charles Lyell, who says in his 

 " Principles of Geology," p. 289, "If we could compare with equal accuracy the 

 ancient and actual state of all the islands and continents, we should probably 

 discover that millions of our race are now supported by lands situated where 

 deep seas prevailed in earlier ages. In many districts not yet occupied by man, 

 land, animals, and forests now abound, where ships once sailed ; and on the other 

 hand, we shall find on inquiry that inroads of the ocean have been no less con- 

 siderable. When to these revolutions produced by aqueous causes, we add 

 analogous changes wrought by igneous agency, we shall perhaps acknowledge the 

 justice of the conclusion of Aristotle, who declared (Meteorics, chap. 12) that ' the 

 "whole land and sea on our globe periodically changed places.' " 



In the Geological Section, under the presidency of Wm. Hopkins, M.A., F.R.S., 



the following papers were read: — 



T. W. Embleton. — On the Northern Division of the Yorkshire Coal Field. 

 Rev. J. W. Norwood.— On the Comparative Geology of Hotham, near Cave. 

 J. W. Dawson. — On Vegetable Structure visible in the Coal of jVova Scotia. 



G. Bevan, M.D.—<Ju the Marine Shell Bed of the South Wales Coal Basin. 



Rev. E, Trolkipe.— On the Geology of a part of Lincolnshire hitherto unexplained. 

 Rev. F. F. Statlmm. — On the Geology of the Scilly Islands. 



Sorhy, B. C— On the effect of currents in producing the structure of the Millstone Grit. 

 T. P. Teale. — On the Deposits of the Aire Valley. 

 J. G, Marshall. — On the Geology of the Lake District. 



W. Fen gelly.— On a recently discovered Ossiferous Cavern, at Brixham, Devon; and On the 



progress made iu the excavation at the Brixham Bone Cave, by Professor Ramsay. 

 Professor Phillips. — On the Hematite Ores of North Lancashire, and a communication from R, Baker, 



Jun., on the Hematite deposits of West Cumberland. 

 Professor Harkness.— On the Origin of Breccias of the Southern portion of the valley of the Nith. 

 Albany Hancock.— Remnrks on certain vermiform fossils found in the Mountain Limestone Districts of 



the North of England. 

 W. Pengelly. — On an Ichthyolite found in the Devonian Slates of East Cornwall. 



— ■ On the Trilobite found at the Knoll Hill, Newton Abbott, Devon. 



David Page. — On the Skeleton of a Seal from the Pleistocene Clays of Stratheden, Fifeshire. 

 Professor Phillips.— 'Notice of some phenomena at the junction of the granitic and schistose rocks iu 



West Cumberland, and on the slaty cleavage in the Lake District. 

 Professor Harkness — On the distortion of Fossils. 



Professor King. — On the jointed structure of Rocks, particularly as displayed in some localities 

 in Ireland. 



H. C. Sorhy. — On some peculiarities in the arrangement of the minerals in igneous Rocks, and on a 

 new method of determining the temperature and pressure at which various minerals and rocks 

 were found. 



David Page.— YvLrtheT contributions to the palaeontology of the " Tile-stones," or Siluro-Devonian 



strata of Scotland, 

 Professor Huxley. — Observations on the genus Pteraspis. 

 Charles Moore. — On the conglomerates near Frome, and theu' organic remains. 



Edward Charlesworth. — On some remarkable Yorkshire Fossils, including the unique Plesiosauri in 

 the Museum at York, with pictorial restorations, by Mr, Waterhouse Hawkins, of the Crystal Palace. 

 Rev. Wm. Thorpe — On the Permian System in Yorkshire. 

 Lucas Barrett. — On the Atlas and Axis of the Plesiosaurus. 

 iS'. Baines.— On Yorkshire Flags with Fossils. 



Professor Rogers.— Ou the discovery of Strata of supposed Permian Age in the Interior of North 



America, by Mr. Meek and other American Geologists. 

 John Wolley, Jun., M.A. — Observations on the arrangements of the small Stones on certain bare 



levels in Northern Localities. 

 W. Matthews.— Photogi-aphs of the Rowley Rag Quarry at Ponk Hill in Walsall. 

 3'. W. Jffciiison,— Volcanos of Central Asia, commencing with the Baikal in Oriental Siberia, and 



extending into Mengalid and Chinese Tartary. 

 Alphonse Gages. — On some Molecular Phenomena produced by the action of Acids on Hydrous 



Magnesian Rocks, &c. 



Professor Owen. — On a new Genus and Species of Pterodactyle, with remarks on the Geological Distri- 

 bution of the Flying Reptiles. 

 Sir R. 1. Murchison.—Resnlts of recent research among the older Rocks of Ihe Scottish [lighlands. 

 Professor Nicol.— On the Age and Relations of the Gneiss Rocks in the North of Scotland. 

 David Page.— On the Relations of the Metamorphic and older Palaeozoic Rocks of Scotland. 

 Dr. Anderson. -On the Fossils and Yellow Sandstone of Dura Den. 

 Steplien Eddy.— On the lead-bearing districts of North Yorkshire. 



W. H. Baily.— On the new Species of Crustacea from the Coal Measures in Queen's County, Ireland; 



and some remarks on forms allied to them. 

 On the fructification of Alethoptexis (Cyclopteris) Hibernica, from the Upper Devonian 



or Lower Carboniferous strata at Kiltorkan Hill, County Kilkenny. 



