CONTENTS. 



VIII. Observations on a Well dug on the South side of Hampstead Heath. 



By Nathaniel Thomas Wetherell, Esq. F.G.S. ... p. 131 



IX. Observations on the Strata penetrated in sinking a Well at Diss, in 



Norfolk. Bij John Tay\oT, Esq. Treas. G.S. . . . . p. 137 



X. On the Structure of the Neighbourhood of Gamrie, Banffshire, par- 



ticularly on the Deposit containing Ichthyolites. By Joseph 

 Prestwich, /mw., £.V5. F.G.A^ p. 139 



XI. Notices on the Geology of the North Coast of the Counties of Mayo 



and Sligo in Ireland. J5y Archdeacon Verschoyle, M^. {Com- 

 municated by 'B.odiexicVlm^ey MvlycYAsow, Esq. P. G.S.) . . p. 149 



XII. Description of some Fossil Crustacea and Radiata, found at Lyme 

 Regis, in Dorsetshire, ^y William John Broderip, Esq. F.G.S. 

 F.R.S. 8(c. V.P.Z.S p. 171 



XIII. On the Bones of Birds discovered in the Strata of Tilgate Forest, in 



Sussex. By Gideon Mantell, Esq. LL.D. F.R.S. . . . p. 175 



XIV. On the Syenite Veins which traverse Mica Slate and Chalk at Good- 



land Cliff and Torr Eskert, to the south of Fair Head, in the County 

 of Antrim. By Richard Griffith, Esq. F.G.S. M.R.I.A. P.G.S. 

 of Dublin . . . p 179 



XV. On certain Peculiarities in the Cervical Vertebrce of the Ichthyo- 

 saurus, hitherto unnoticed. By Sir Philip Grey Egerton, Bart. 

 M.P. V.P.G.S p. 187 



XVI. Notes to accompany a Geological Map of the Forest of Dean Coal- 

 field. By Henry Maclauchlan, Esq. F.G.S., Emjiloyed on the Ord- 

 nance Trigonometrical Survey . . . . . . . p. 195 



XVII. Notice respecting a Piece of recent Wood, partly petrified by Carbon- 

 ate of Lime, with some Remarks on Fossil Woods. By Charles 

 Stokes, Esq. F.G.S p. 207 



XVIII. Remarks on a Section of the Upper Lias and Marlstone of Yorkshire, 

 showing the limited Vertical Range of the Species of Ammonites 



