80 
HISTORICAL AND STRATIGRAPEICAL GALLERY. 
formed by William Smith, the pioneer of geology in this country, 
the Searles Wood Collection of Crag MoUusca, the Edwards Col- 
lection of Eocene MoUusca, the Davidson Collection of Brachiopoda, 
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. 
Fig. .56. — A Trilobite from the Lower Cambrian of Shropshire. 
stratigraphi- In the wall-cases on the west side of this gallery is exhibited 
o'fBriti8V°° ^ stratigraphi cal collection, showing the most characteristic 
Palaeontology, rock-specimeus, often with their included organic remains, re- 
presenting 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,, gjid grmdually 
