Geological Society. 73 



Although Dr. Geikie advocates the fissure-eruption theory in 

 explanation of certain volcanic phenomena, it must be remembered 

 that Mr. Scrope, in his energetic review of the Natural History 

 of Volcanic Bocks, strongly opposed Eichthofen's twofold division 

 of volcanic rocks into " massive eruptions " and the products of 

 " volcauos proper," and remarked: — "It is utterly impossible to find 

 in the writings of its advocates or in nature any intelligible distinc- 

 tion between volcanic rocks that have issued from fissures, so as to 

 form ' massive ' or ' elongated ' or ' dome-shaped ' mountains, and 

 rocks produced by eruptions from ' volcauos proper ' " (Geol. Mag. 

 vol. vi. p. 512). 



The last three chapters include lectures on the Scottish school of 

 geology, Geographical evolution, and on the Geological influences 

 which have affected the course of British history. 



These well-written essays, now collected and revised, fully con- 

 vev in a clear and pleasant manner the vivid impressions made on 

 the author during his geologic wanderings, and are replete with 

 scientific facts, occasionally interspersed with notes and illustra- 

 tions of the striking features of the scenery or of historic and 

 legendary interest. 



VIII. Proceedings of Learned Societies. 



GEOLOGICAL SOCIETY. 



[Continued from Vol. xiii. p. 375.] 



April 26, 18S2.— J. TV Hulke, Esq., F.B.S., President, 



in the Chair. 



THE following communications were read : — 

 1. " On Eossil Chilostomatous Bryozoa from Mount Gam bier, 

 South Australia." By Arthur TV Waters, Esq., E.L.S., E.G.S. 



2. "Tliamniscus : Permian, Carboniferous, and Silurian." By 

 George TV Shrubsole, Esq, E.G.S. 



3. " On the Occurrence of a New Species of FhyUopora in the 

 Permian Eimestones." By George TV. Shrubsole, Esq., E.G.S. 



4. "On the Belations of the Eocene and Oligocene Strata in the 

 Hampshire Basin." By Prof. John TV Judd, E.E.S., Sec.G.S. 



The section at TThitecliff Bay, in the Isle of Wight, affords us 

 the means of determining the true order of succession of nearly 

 2000 feet of Tertiary strata, and is therefore employed as a standard 

 to which to refer the strata seen in sections where the order of 

 succession is not so clear. The author supported the views of Prof. 

 Prestwich as to the limits of the Bracklesham series, as opposed to 

 the opinions expressed on the subject by the Rev. 0. Eisher. He 

 pointed out the confusion which has arisen from the correlation of 

 certain strata in the Hampshire basin with the barren Lower and 

 Tipper Bagshots of the London area, in which fossils are so rare as 

 to render their geological age somewhat doubtful. To the Lower 

 Ba°:shot some authors have referred 660 feet of the strata seen at 



