178 . - ZOOLOGICAL GEOGRAPHY. [PART III. 
very characteristic and almost exclusively confined to it, are in 
italics. The number prefixed to each family corresponds to 
that of the series of families in the Fourth Part of this work, 
so that if further information is required it can be readily 
referred to without consulting the index. Names inclosed in 
parentheses—( .. . ) thus—indicate families which only just 
enter a region from an adjacent one, to which they properly 
belong. The eye is thus directed to the more, and the less im- 
portant families ; and a considerable amount of information as 
to the general features of the zoology of the region, is conveyed 
in the easiest manner. 
The tables of genera of Mammalia and Birds, are arranged on 
a somewhat different plan. Each genus is given under its 
Family and Order, and they follow in the same succession in all 
the tables. The number of species of each genus, inhabiting 
the region, is given as nearly as can be_ascertained ; but in many 
cases this can only be a general approximation. The distribution 
of the genera within the region, is then given with some detail ; 
and, lastly, the range of the genus beyond the region is given 
in general terms, the words “ Oriental,” “Ethiopian,” &c., being 
used for brevity, to indicate that the genus occurs over a con- 
siderable part of such regions. Genera which are restricted to . 
the region (or which are very characteristic of it though just 
transgressing its limits) are given in italics ; while those which 
only just enter the region from another to which they really 
belong, are enclosed in parentheses—( ... ) thus. The genera 
are here numbered consecutively, in order that the number of 
genera in each family or each order, in the region, may be readily 
ascertained (by one process of subtraction), and thus compari- 
sons made with other regions or with any other area. As the 
tables of birds would be swelled to an inconvenient length by 
the insertion in each region of all the genera of Waders and 
Aquatics, most of which have a very wide range and would 
have to be repeated in several or all the regions, these have 
been omitted; but a list has been given of such of the genera 
as are peculiar to, or highly characteristic of each region. 
As this is the first time that any such extensive tables of 
