THE ROCK ROOM. 
149 
of Wall Cases to the southern end of the Western Gallery, over 
the Ceramic Department of the Museum. Some also are placed 
in the Table Cases (A, B) of the embayments. The Pleistocene 
collection includes the rich series made by the late Dr. Cotton, 
from the brick-earths of Ilford in Essex. Conspicuous among the 
Pleistocene fossils are the enormous limb-bones, the tusks and 
the grinding-teeth of the mammoth, or great hairy elephant of 
the north ; and special note should be made of the mammoth 
remains found in 1892, during drainage operations in Endsleigh 
Gardens, and described by Dr. Hicks. Other pleistocene mam- 
mals, well -represented here, are the woolly rhinoceros, the hippo- 
potamus — of which a large series of relics is exhibited from 
Barrington in Cambridgeshire — the great urus, the bison, the 
musk-ox — of which a fine skull, with horn cores, is exhibited 
from Crayford in Kent — the cave-bear, the cave -hyaena, the 
cave-lion, the Irish big-horn, &c. The Table Case (A) in Recess 2 
contains a collection of mammalian teeth illustrating the den- 
tition of certain Pleistocene genera. It may be well to state that 
the stone-implements of palaeolithic man, the contemporary of 
the extinct pleistocene mammals, will be found in Case No. 23 
on the Ground Floor. (See p. 51.) 
ROCK ROOM. 
A room entered from the southern end of the Upper Gallery 
is devoted to the exhibition of a Collection of Rocks, and is 
consequently known as the Rock Room, or Petrographical 
Gallery. In front of the Entrance stands a model, by Sir 
Archibald Geikie, showing the geological structure of the Isle of 
Eigg , one of the Inner Hebrides. The doorway is surmounted 
by a fine pair of antlers of the great extinct Irish Deer (Cervus 
megaceros) ; and there is also placed over the door a gilt ball 
representing the Sun, and forming one of the series of models 
illustrating part of the Solar system, already referred to 
(p. 145). _ 
Immediately in front of the visitor, on entering the Rock 
Gallery, is a Table Case (A) containing selected examples of 
Rock-forming Minerals. The student will find here a compact 
collection, restricted to such mineral-species as are important in 
petrographical study. It commences with the series illustrating 
the varieties of Quartz; the number of specimens having been, 
of set purpose, limited, and each specimen being distinctly 
labelled so as to tell its own meaning. A glass shelf, placed 
above, supports a number of wooden models illustrating the 
typical forms of crystals of quartz ; whilst with these are 
associated certain sketches, by Mr. F. Rutley, showing the 
appearance which quartz presents when viewed in thin sections 
under the microscope. Then follow the felspars, forming a 
compact and important group ; and these are succeeded by the 
