332 
GEOGRAPHICAL ZOOLOGY. 
[part iv, 
region closely approaches it in both respects ; but the Austra- 
lian region is by far the richest, possessing nearly double the 
genera and species of any other region, and abounding in re- 
markable forms quite unlike those of any other part of the 
globe. The following table gives the number of genera and 
species in each region, and enables us readily to determine 
the comparative richness and isolation of each, as regards this 
extensive family : — 
Regions. 
No. of Genera. 
Peculiar Genera. 
No. of Species. 
Neotropical 
13 
9 
75 
Nea retie 
5 
1 
7 
Palsearctic 
3 
0 
9 
Ethiopian 
6 
1 
37 
Oriental 
12 
1 
66 
Australian 
24 
14 
143 
With the exception of Columba and Turtur, which have a 
wide range, Treron, common to the Oriental and Ethiopian 
regions, and Carpophaga , to the Oriental and Australian, most 
of the genera of pigeons are either restricted to or very 
characteristic of a single region. 
The distribution of the genera here admitted is as follows : — 
Treron (37 sp.), the whole Oriental region, and eastward to 
Celebes, Amboyna and Flores, also the whole Ethiopian region 
to Madagascar; Ptilovus (52 sp.), the Australian region (exclud- 
ing New Zealand) and the Indo-Malay sub-region ; Aledrcenas 
(4 sp.), Madagascar and the Mascarene Islands : Carpophaga 
(50 sp.), the whole Australian and Oriental regions, but much 
the most abundant in the former; ( 2274 ) Iantlicenas (11 sp.), 
Japan, Andaman, Nicobar, and Philippine Islands, Timor and 
Gilolo to Samoa Islands ; ( 2278 ) Leucomelmna (1 sp.), Australia ; 
Lopholaimus (1 sp.), Australia ; ( 2279 and 2283 ) Alsmomus (2 sp.), 
Himalayas to Ceylon and Tenasserim ; Columba (46 sp.), 
generally distributed over all the regions except the Australian, 
one species however in the Fiji Islands ; Edopistes (1 sp.), east 
of North America with British Columbia; Zenaidura (2 sp.), 
Yeragua to Canada and British Columbia ; (Ena (1 sp.), Tropical 
and South Africa; Geopelia (6 sp.), Philippine Islands and Java 
to Australia; Macropygia (14 sp.), Nepal, Plainan, Nicobar, Java, 
