84 



HISTORICAL AND STEATIGRAPHICAL GALLERY. 



BritiBh 

 Stratigraphi 



Collection of Brachiopods, the types of Sowerby's "Mineral 

 Conchology," and lastly, but not least in interest, specimens 

 from the collection of Sir Hans Sloane, which was the nucleus 

 of the whole Museum. 



In the wall-cases on the west side of this gallery is exhibited 



oal c^ction. ^ stratigraphical collection, showing a series of rock-specimens, 



Fig. 56. — An Ammonite, 

 FROM THE Oolite. 



Fig. 55. — A Tukrilite, 

 PROM THE Chalk. 



Fig. 57.— a Trilobite, from the Lower Cambrian of Shropshire. 



often with their included fossil remains, representing the 

 various geological formations of the British Isles, arranged in 

 the order of their sequence in time, commencing near the 

 entrance door with the most recent, and gradually passing 

 down to the most ancient fossil-bearing strata. Along the top 

 of the case is displayed a running section of all the water-formed 



