FLOOR.] 
FIRST BOTANICAL ROOM. 
211 
the shelves, and microscopic sections showing the seeds are placed in 
the Table Case. 
Woods belonging to the more highly organized Angiospermous 
Dicotyledons are contained in Case 30. 
A large Exogenous trunk, completely bored by Teredina personata, 
a mollusk allied to the Shipworm, is placed at the end of the room. 
It had floated in the Tertiary seas until it was completely destroyed 
by this boring shell, and was ultimately buried in the London clay. 
Smaller fragments of wood from Tertiary strata bored by the same, 
and a fragment from the Green sand by a similar mollusk are placed 
in Case 6. 
The series of fossil remains is continued in the table cases oppo- 
site. Case 33 illustrates the condition of plant remains in which the 
substance of the original organisms continues, but is more or less 
altered. Various stages from ordinary wood to coal are represented 
by different specimens. The scarcely changed wood from one of the 
piles of old London Bridge, from the royal palace at Nineveh, and 
from a submarine forest in Somersetshire, lead on to the more highly 
altered woods and leaves from the Brown-Coal of Germany ; and these 
are again succeeded by the Coniferous wood and jet from the secondary 
rocks of Britain, and lastly by true coal. Illustrations are also 
shown of similar changes produced more rapidly under the influence of 
heat in the different grains obtained after the famous fire in Tooley 
Street, in 1861, and in a specimen of linseed charred by heating in the 
confined hold of the vessel in its passage from the Black Sea to the 
port of London. In the next case (34) are placed specimens in which the 
plants are represented by amorphous casts, or by mineral pseudomorphs 
of the original structures. In Cases 35 and 36 are placed a series of 
sections of fossil plants fitted for microscopic examination and exhi- 
biting their minute structure. The sections are arranged in the syste- 
matical order observed throughout the rooms. A few cellular crypto- 
gams begin the series. Then an extensive series of vascular 
cryptogams from coal measures, including the fruits and stems of Ferns, 
Calamites, and Lycopods. Then follow in Case 36 a few palm stems, 
a series of the fruits and stems of Conifers, and several angiosperm- 
ous Dicotyledons, including several specimens from Tertiary rocks of 
England. 
On the end walls of this room are hung a selection of drawings 
of Australian plants from the large series made by Ferdinand Bauer. 
The original sketches were drawn in Australia when he accompanied 
Robert Brown as Natural History Artist in Capt Flinders' expedition. 
The finished drawings were made between 1805 and 1813 after his 
return to England. The specimens selected illustrate some of the 
more remarkable forms of Australian Orchids. 
Below these drawings are placed sections of Exogenous stems, among 
which may be noticed large trunks of Quercus alba and Juglans nigra 
from Upper Canada, and of Gum-trees, Acacias &c, from Australia. 
There still remains to be noticed the large series of specimens of 
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