CHAP. XVI1I.J 
BIRDS. 
345 
species which enters the Australian region as far as Celebes and 
Timor, and another species ( Gallus ozneus) as far as Mores, and 
it is not improbable that these may have been introduced by man 
and become wild. 
We have very little knowledge of the extinct forms of Gallinse, 
but what we have assures us of their high antiquity, since we 
find such distinct groups as the jungle-fowl, partridges, and 
Pterocles , represented in Europe in the Miocene period ; while 
the Turkey, then as now, appears to have been a special American 
type. 
Order VI. — OPIBTHOGOMI. 
Family 93. — OPISTHOCOMIDiE. (1 Genus, 1 Species.) 
General Distribution. 
Neotropical 
Sub-regions. 
Nearctic 
Sub-regions. 
Pal.ear.ctic 
Sub-regions. 
Ethiopian 
Sub-regions. 
Oriental 
Sub-regions. 
Australian 
Sub-regions. 
— 2 
The Hoazin ( Opisthocomus cristaius) is the sole representative 
of this family and of the order Opisthocomi. It inhabits the 
eastern side of Equatorial America in Guiana and the Lower 
Amazon ; and at Para is called u Cigana ” or gipsy. It is a 
large, brown, long-legged, weakly-formed and loosely-crested 
bird, having such anomalies of structure that it is impossible 
to class it along with any other family. It is one of those 
survivors, which tell us of extinct groups, of whose past existence 
we should otherwise, perhaps, remain for ever ignorant. 
Order VIL—ACCIP1TEE8. 
Family 94. — VULTURIDiE. (10 Genera, 25 Species.) 
General Distribution. 
Neotropical 
Sub-regions. 
Nearctic 
Sub-regions. 
Paljsarctic 
Sub-regions. 
Ethiopian 
Sub-regions. 
Oriental 
Sub-regions. 
Australian 
Sub-regions. 
1 . 2 . 3 . 4 
1 . 2 . 3 . 4 
1 . 2 . 3 . 4 
1 . 2.3 — 
1 . 2 . 3 — 

