CONTENTS. 



Page 



On the relative position of the Serpentines (Ophiolites), 



Diallage Rocks ( Euphotides ) ^ Jasper, 8(c. in some 



parts of the Apennines. By Alexander Brong~ 



NJART, Member of the Royal Academy of Sciences, 



&;c.8^c 161 



On l^ossil Vegetables traversing the beds of the Coal 

 Measures. By Alexander Brongniart, Mem- 

 ber of the Academy of Sciences, Sfc. . . 208 



Notice on the Coal Mines of the Basin of the Aveyron. 

 By M. LE Chevalir Du Bosc, Engineer of the 



Royal Mining Corps 217 



Notice on the Geology of the Western part of the Pala- 

 tinate. By M. DE BoNNARD, Engineer in Chief 



of the Royal Mining Corps , 220 



On the Zoological characters of formations, with the 

 applications of these characters to the determina- 

 tion of some Rocks of the Chalk formation. By 

 Alexander Brongniart, Member of the Royal 



Academy of Sciences, 8fc 237 



Notice on the Hartz. By M. de Bonnard, Ingenieur 



en Chef of the Royal Mining Corps 262 



On the calcareo-trappean formations of the Southern 

 foot of the Lombard Alps. By Alex. Broxgni- 

 AHT, Member of the Royal Academy of Sciences, 



8fc 273 



Notice on the MagnesUe of the Paris Basin, and of the 

 position of this rock in other places. By Alex. 

 Brongniart, Member of the Royal Academy of 



Sciences, 8{c 282 



Observations on a Sketch of a Geological Map of France, 

 the Pays-Bays, and neighbouring countries. By 



J. J. D'Omalius d'H alloy 293 



On the Geology of the Environs of St. Leger sur 

 Dheune. (Department of the Saone and Loire.) 



By M. Levallois 309 



APPENDIX. Description of the Muschelkalk and 



Quadetsandstein. By A, Von Humboldt .... 313 

 On Muscltelkalk and Quadersundstein. By A. Bous' 319 



