Geological Society. 515 



trees ; and in a second paper the same author describes an ancient 

 Lake-basin at Holyrood. Other papers on Stratigraphical Geology 

 are given : — Mr. Hamilton Bell writes " On Exposures of the Old 

 Red between Callender and Crieff;" Mr. T. Wallace, "Upper 

 Stratherrick ; " and Mr. M'Diarmid, " On a Boring at Dumfries." 

 In this boring, at 149 feet from the surface, a bed of Permian 

 breccia, composed of fragments of Silurian Bocks, Porphyry, and 

 Eelstone, was met with, and proved to be 283 feet in thickness. 



The Palaeontological papers include : — Mr. Tait Kinnear, " On 

 the genus Fenestella" and " On a new Crustacean from Ardross." 

 The first paper deals with the revision of species of this typically 

 Carboniferous genus of Polyzoa; and the second notices a new 

 fossil Schizopod for which Mr. Peach proposes the name JRostrocaris. 

 Mr. James Thomson contributes one of his illustrated papers on 

 the Corals — with figures of the genus Lithrostrotion ; and Mr. John 

 Young discusses Ulrich's Cystodictyonidce, a family of Carboni- 

 ferous Polyzoa. 



A Petrological paper is given by Mr. A. Johnstone, who treats 

 of the " Evolution and Classification of Igneous Bocks ; " while 

 Physical Geology includes a paper by Dr. Black on " Brighton 

 Beaches after Storms of October and December 1886," and an 

 address by Mr. James Melvin on " Hutton's views of the Vegetable 

 Soil or Mould, and Vegetable and Animal Life." 



Perhaps, however, the most important contribution to the pre- 

 sent number is Prof. E. A. Claypole's paper on " The Lake Age in 

 Ohio." By a careful study of the glacial deposits in the Northern 

 United States, Prof. Claypole is enabled to map out the old Lake- 

 Basins caused by the Ice-dams and other obstructions, his views 

 being rendered much clearer by a series of sketch-maps which 

 accompany the paper. These old lakes were apparently much 

 larger than any now existing, their size and extent varying con- 

 stantly, according to the advance, retreat, or breaching of the 

 Ice-dams. The nature and violence of the glacial floods are fully 

 discussed, and attention is drawn to the enormous and often 

 repeated denudation which occurred during this period. 



LXV. Proceedings of Learned Societies. 

 GEOLOGICAL SOCIETY. 



[Continued from p. 447.] 



April 25, 1888.— W. T. Blanford, LL.D., F.R.S., President, 

 in the Chair. 



^ITEE following communications were read : — 

 -*- 1. " Report on the Recent work of the Geological Survey in the 

 North-west Highlands of Scotland, based on the field-notes and maps 

 of Messrs. Peach, Home, Gunn, Clough, Hinxman, and Cadell." 

 At the outset a review was given of the researches of other 



