444 
ZOOLOGICAL GEOGRAPHY, 
[part hi. 
possess hardly anything, hut what they might have received 
hy immigration over a wide extent of ocean. 
Ladrone , and Caroline Islands, — These extensive groups of 
small islands are very imperfectly known, yet a considerable 
number of birds have been obtained. They possess two 
peculiar Polynesian genera, Tatare and Sturnodes ; one peculiar 
sub-genus, Psammathia (here included under Acrocephalus ) ; 
and ten of the typical Australian genera found in Polynesia, — 
Lalage, Monarcha, Myiagra , Phipidura, Myzomela, Erythrura, 
Artamus, Phlogcenas, Ptilopus, and Megapodius , as well as the 
Papuan genus Rectes, and the Malayan Calornis ; — so that they 
can be certainly placed in the sub-region. Genera which do 
not occur in the other Polynesian islands are, Acrocephalus , (s.g. 
Psammathia) originally derived perhaps from the Philippines ; 
and Caprimulgus, a peculiar species, allied to one from Japan. 
New Caledonia , and the New Hebrides . — Although these islands 
seem best placed with Polynesia, yet they form a transition to 
Australia proper, and to the Papuan group. They possess 30 
genera of land-birds, 18 of which are typical of the Australian 
region ; but while 13 are also Polynesian, there are 5 which do 
not pass further east. These are Acanthiza, Eopsaliria , Glici- 
phila, Philemon , and Ianihoenas. The peculiar Polynesian genus, 
Aplonis , of which three species inhabit New Caledonia, link it to 
the other portions of the sub-region. The following are the 
genera at present known from New Caledonia : — Turdns , Acan- 
thiza, Campephaga , Lalage, Myiagra , Phipidura, Pachycephala, 
Eopsajtria, Comas, Physocorax (s.g. of Corvus, allied to the jack- 
daws), Glicphilo., Antlwchcera, Philemon , Zosterops , Erxjthrura, 
Aplonis, Artamus, Cucxdus, Halcyon, Collocalia, Cyanorampthus, 
Trichoglomis, Ptilopus, Carpophaga, Macropygia, Ianthmnas , 
Chalcophaps, Haliastur, Accipiter. The curious Phinochetus 
juhatus , forming the type of a distinct family of birds (Rhino- 
chetidse), allied to the herons, is only known from New Cale- 
donia. 
It thus appears, that not more than about 50 genera and 150 
species of land-birds, are known from the vast number of islands 
that are scattered over the Central Pacific, and it is not probable 
