CONTENTS. 



PART II. 



XXIV. On the Distribution arid Classification of the Older or Paleeozoic Deposits 

 of the North of Germany and Belgium, and their comparison with 

 Formations of the same age in the British Isles. By the Rev. Adam 

 Sedgwick, M.A., F.R.S., F.G.S., Woodwardian Professor in the Univer- 

 sity of Cambridge, ^c, and Roderick Impey Murchison, Esq., F.R.S., 

 F.G.S., Hon. M.R.I. A., ^c p. 221 



XXV. On the Fossils of the Older Deposits in the Rhenish Provinces ; preceded 

 by a general Survey of the Fauna of the Palaeozoic Rocks, and followed 

 by a Tabular List of the Organic Remains of the Devonian System in 

 Europe. By Viscount dArchiac and M. Edouard de Verneuil, Members 

 of the Geological Society of France ....... p. 303 



XXVI. Description of the Remains of a Bird, Tortoise and Ijizard from the Chalk. 



By Richard Owen, Esq., F.R.S., F. G.S. Instit. Reg. Sc. Paris Corresp. p. 41 1 



XXVII. On the Distribution of the Erratic Boulders and on the Contemporaneous 

 Unstratified Deposits of South America. By Charles Darwin, Esq., 

 M.A., F.R.S., F.G.S. p. 415 



XXVIII. On the Geology of the South-east of Devonshire. By Robert Alfred 



Cloyne Austen, Esq., F.G.S p. 433 



XXIX. On the Characters of the Beds of Clay immediately below the Coal-seams 

 of South Wales, and on the occurrence of Boulders of Coal in the Pennant 

 Grit of that district. By WiWiam E,. hogan, Esq., F.G.S. . . p. 491 



XXX. Sketch of the Geology of Aden, on the coast of Arabia. By Frederick 



Burr, Esq. Communicated by John Taylor, Esq., Treas, G.S. . . p. 499 



XXXI. On the Teeth of species of the genus Labyrinthodon (Mastodonsaurus of 

 Jaeger), common to the German Keuper formation and the Lower Sand- 

 stone of Warwick and Leamington. By Richard Owen, Esq., F.R.S., 

 F.G.S., Instit. Reg. Sc. Paris Corresp. ...... p. 503 



XXXII. Description of parts of the Skeleton and Teeth of five species of the genus 

 Labyrinthodon (Lab. leptognathus, Lab. pachygnathus, and Lab. ventri- 

 cosus, from the Coton-end and Cubbington Quarries of the Lower War- 

 wick Sandstone ; Lab. J3sgeri,from Guys Cliff, Warwick, and Lab. scu- 

 tulatus, from Leamington) ; with remarks on the probable identity of the 

 Cheirotherium with this genus of extinct Batrachians. By Richard Owen, 

 Esq., F.R.S., F.G.S., Instit. Reg. Sc. Paris Corresp. . . . p. 515 



