Xll 



CONTENTS. 



Wall-case 41. 



Introductory notice on stratified rocks, by A. C. Eamsay - 



Conglomerates, &c, described by H. W. 



Conglomerates and Breccias - 

 Grits - 



Sandstone - 



Sand, &c. - - 



Marlstone - 



Clay, with notes ■ • 



Shale, with notes - 



Coal, with notes - 



On the mode of occurrence of Coal, and the manner in which it 



was formed, by A. C. Eamsay 

 Arenaceous Shale ----.. 

 Argillaceous Limestone -.-'.. 



Specimens illustrative of peculiarities of old sea bottoms, Bone- 

 beds, &c, with notes -•--.. 



i 



PAGE 



38 

 40 

 40 

 45 

 46 

 49 

 52 

 53 



55 

 56 



58 

 61 

 61 







61 



Flint 

 - Chert 



Wall-case 42. 



H. W. Bristow, with notes by A. C. Ramsay 



Quartz and silicified wood 



64 

 65 

 66 

 67 



Wall-case 43. 



Introductory remarks to the Limestone specimens, by A. C. Ramsay 

 Limestones, &c, described by H. W. Bristow, with notes 

 Limestone, Marble, &c. - 



Ironstone and ikon ores -».-.. 



68 

 69 

 69 



87 



1 



Wall-case 44. 



Nodules, Concretions, Geodes, Septaria, &c., described by 

 H. W. Bristow, with introductory note by A. C. Ramsay 



92 



