Parr II. 
ANIMAL LIFE. 
IL—INTRODUCTION AND CLASSIFICATION. 
All natural objects can be classed under two heads, the 
animate and the inanimate. To the former belong animals 
and plants, and to the latter rocks and minerals. 
Animate nature is divided into two main groups, called 
kingdoms—the animal and the vegetable—and these 
are again subdivided into smaller and smaller groups. 
‘The animal kingdom consists of a number of sub- 
kingdoms, each of which is again composed of smaller 
divisions or congregations of life called classes, though 
the sub-kingdom may be split up into an intermediate 
group of sub-branches. The classes are composed of 
orders, the orders of families, the families of genera, 
the genera of species, and the species of varieties. 
In the outline given below, two of the sub-kingdoms, 
vtz., Protozoa and Molluscoidea, have been omitted, as in 
the following pages no mention is made of animals 
belonging to these sub-divisions, and as, moreover, they 
comprise life-forms not likely to engage the attention of the 
Nature-study student in our primary schools. 
