FIRST FLOOR. 
51 
In the wall-cases on the west side of this gallery is exhibited stratigrapM- 
a stratigraphical collection, intended to show the most charac- of British^°^ 
teristic organic remains of the various geological formations of Palaeontology, 
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. The arrangement of this collection is not yet com- 
pleted. On the east side are exhibited additional specimens of 
marine reptiles from the Lias and a series of foot-prints of 
reptiles from the Trias of IST. America and the ISTew Eed Sand- 
stone of England, &c. 
First Eloor. 
The gallery on this floor, entered from the south end of the Gallery of 
east corridor of the hall, contains the extensive Mineral Collec- 
tions, a full description of which will be found in a special 
guide.* 
Entering the gallery the visitor will find, in the first window- introductory 
case on the left-hand side, a series of specimens selected and Collections, 
labelled to serve as an introduction to the study of minerals. 
Beginning with a definition of what is meant by a mineral, it 
is there shown how essential characters were gradually recog- 
nised, and how minerals have been distributed into kinds and 
classified. 
In the next three window-cases specimens are arranged to 
illustrate the various terms which have been found useful in 
the description of minerals. 
Eecently acquired specimens are shown for a time in the fifth Recent 
window-case. acimsitioas. 
The remaining window-cases in the gallery contain the collec- Crystals, 
tions of crystals, models of crystals, and pseudomorphs, and are Psendo- 
, intended for the special student. The general visitor will now °^°'P^s. 
do well to return to the entrance of the gallery and begin the 
examination of the table-cases in which are exhibited speci- 
jmens of every mineral species and variety in the possession 
* * Introduction to the Study of Minerals, with a Guide to the Mineral 
IGrallery.' Price threepence. 
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