32 
NORTH HALL. 
In tlie two wall-cases the upper series of specimens illustrates the 
leaf, its form, veining, direction, the characters of its stalk and 
stipules, its modification for special purposes, and its arrangement 
on the stem and in the bud. In the lower row the root and stem 
are similarly treated, and above are some anatomical drawings. 
In the central case the chief types of the flower with its 
parts, the fruit, and the seed are exhibited. 
A small space at the end of the bay is assigned to hairs, 
prickles, and similar structures, which are divided into two 
classes — Trichomes, or hairs proper, in which only the outer 
cell-layer (epidermis) of an organ takes part ; and Emergences, 
in which tissues beneath the epidermis are also concerned. At 
the back of the bay is a large transverse section of the Karri tree 
{Eucalyptus diversicolor) of Western Australia, a species which 
grows to a height of 400 feet. The tree from which the section 
was cut was about 200 years old when felled. 
The Introductory Collection of Minerals will be found in the 
gallery devoted to that department of the collection (see p. 81). 
The North Hall. 
Domesticated The North Hall, or that portion of the building situated to 
Hybrids' and northward of the principal staircase, is intended for the 
Economic exhibition of the more important breeds of Domesticated 
Zoology. Animals, as well as examples of Hybrids and other Abnor- 
malities. A series of specimens illustrative of Economic 
Zoology is likewise being added. 
The examples of Domesticated Animals are not yet per- 
manently arranged, and many more are required before the 
series can be regarded as at all representative. The chief 
exhibits comprise Cattle, Sheep, Goats, Dogs, and Eabbits. 
One of the main objects of this series is to show the leading 
(characteristics of the well-established breeds, both British and 
foreign. In addition to Domesticated Animals properly so 
called, there are also exhibited examples of what may be termed 
Semi-Domesticated Animals, snch as white or parti-coloured 
J tats and Mice. 
