CONTENTS. 



VOL. IV. 



SESSION 1842-1843. 



On the Geology of the Western States of North America. By David 

 Dale Owen, M.D., of Indiana pag^ 1 



On the Structure of the Delta of the Ganges, exhibited by the boring 

 operations in Fort William in the years 1836-1840. By Lieut. R. 

 Baird Smith, B.E 4 



On Pipes or Sand-galls in Chalk. By Joshua Trimmer, Esq 6 



Qn some remarkable Concretions in the Tertiary Beds of the Isle of 

 Man. By H. E. Strickland, Esq., M.A 8 



Oa the Bala Limestone. By D. Sharpe, Esq 10 



On the discovery of the Remains of Insects in the Lias of Gloucester- 

 shire, with some remarks on the lower members of this Formation. 



! By the Rev. P. B. Brodie, M.A 14 



On certain Impressions on the Surface of the Lias Bone-bed of 



Gloucestershire. By H. E. Strickland, Esq., M.A 16 



!0n the Ridges, Elevated Beaches, Inland Cliffs and Boulder Forma- 

 tions of the Canadian Lakes and Valleys of St. Lawrence. By 



I Charles Lyell, Esq., M.A 19 



lOn a suite of Specimens of Ornithoidichnites, of Fpotrpfipts.,of Birds 

 I on the New Red Sandstone of Connecticut, United States. By 



I G. A. Mantell, Esq., LL.D 22 



Extract of a Letter on newly-discovered Ichthyolites in the New Red 



Sandstone of New Jersey, United States. By W. C. Redfield, Esq. 23 

 On the Silurian Rocks of the South-jpf Westmoreland and North- of 

 Lancashire. By D. Sharpe, Esq.. ...^.,....'/5v.;r-;:^ff.>.. ••..-••........ 23 



On the Stratified Rocks of Berwickshire and Ih^ ilfibedded Organic 

 Remains. By Mr. W. Stevenson, of Dunse 29 



On the Tertiary Strata of the Island of Martha's Vineyard in Massa- 

 chussetts. By Charles Lyell, Esq., M.A 31 



Letter on Fossil JBones found in digging the New Brunswick Canal in 

 Georgia, United States. By J. Hamilton Cooper, Esq 33 



Description of some Fossil Fruits from the Chalk Formation of the 

 Soutii-east of England. By G. A. Mantell, Esq., LL.D 34 



