S06 Geological Society. 



extend for several hundred miles, with few interruptions, along both 

 shores of the peninsula, and into Ceylon. Ample evidence is given 

 of the occurrence of nodular and pulverulent lime all over Dukhun 

 and Hindoostan. With respect to granite and gneiss, Dr. Voysey 

 collected facts which led him to believe that these rocks constituted 

 the basis of the whole peninsula, and, on this belief, must occupy an 

 area, roughly calculated, of about 700,000 square miles. 



The author is not aware of the occurrence of sedimentary rocks in 

 Western India south of Baroach, excepting such as may have resulted 

 from the consolidation of comparatively recent alluvium. 



Finally, the author considers the characteristic geological features 

 of the peninsula to consist in the amazing extent of the trap, and 

 the horizontal position of its stratified beds ; in the granitic basis of 

 the whole country j in the existence of trap veins in granite ; the 

 absence, as far as is at present known, of that uniform series of rocks 

 constituting the formations of Europe $ in the extended and peculiar 

 nodular limestone and laterite formations ; the occurrence of pulve- 

 rulent [carbonate of ?] lime in seams ; and in the non-discovery hitherto 

 of the fossil remains of extinct animals. 



The memoir was accompanied by a coloured map, two sections of 

 the country, several sketches of its physical features, and numerous 

 rock and mineral specimens. 



A letter was afterwards read, addressed to the Rev. Prof. Buckland, 

 D.D. V.P.G.S. by Joshua Trimmer, Esq. F.G.S., respecting the dis- 

 covery of marine shells of existing species on the left bank of the 

 river Mersey, and above the level of high-water mark. 



Feb. 6. — A paper was read, entitled " Notes to accompany a Map 

 of the Forest of Dean and the Country adjacent, coloured geologi- 

 cally," by Henry Maclauchlan, Esq. F.G.S., employed in the Ord- 

 nance Survey. 



The author commences his memoir by acknowledging the aid which 

 he received from his colleagues employed in the Ordnance Survey, 

 Messrs. J. and R.Wright and Mr. Carrington ; and the valuable assist- 

 ance afforded him by the Rev. W. D. Conybeare, Dr. Buckland, Mr. De 

 la Beche, Mr. Mushet, Mr. H. James, Mr. Bathurst, Mr. Ormerod, 

 Mr. M. Teague, Mr. Bennett, and Mr. Hale. 



The district coloured by the author comprises an area of about 1000 

 square miles. Its western boundary is defined by a line passing from 

 Gold Cliff, near Newport, to Preston on the Wye, eight miles N.W. 

 of Hereford ; and its eastern by another ranging from Didmarton to 

 Stroud, Gloucester, and Hanley Castle, four miles E. of Malvern. 



The author successively describes the band of transition limestone 

 which extends, with little interruption, from Shucknell Hill, four miles 

 and a half N.E. of Hereford, to Flaxley, near W T t\stbury-on-Severn ; 

 the old red sandstone of the district; the carboniferous limestone; 

 coal-measures j new red sandstone ; superficial gravel; and also the 

 faults in the coal-field of the Forest of Dean. 



