320 THE DISTRIBUTION OF AUSTRALIAN LAND-BIRDS. 



Prionodura , . . 2 



Heteromyias 2 



Alachseorhynchus 2 



Arses i, 2 



Scenopaeetes 2 



Oreoscopus 2 



Cyrtostomus 2 



Lamprocorax 2 



Xeochmia i, 2, 8 



Pitta I, 2, 8 



Syma 1,2 



Tanysiptera 2 



Alicroglossus . . . . 2 



Alyristicivora 1,2 



Megapoclius 1,2 



Rallina 2 



Eulabeornis i, 2, 8 



Poliolimnas 1,2 



Area 3 is more closely allied to area 2 than it is to 

 area 4, one reason showing in that it has 297 species to 

 compare with 342 of area 2 (2), while it can compare with 

 only 222 in area 4, and 243 in area 7. 



A stronger reason of its closer affinity with area 2 is 

 that the great bulk of its genera are allied to those of 

 Papua. 



Certain genera (2) of area 3 present in 2 and absent in 

 4 are examples. 



Still there are forms (3) that appear to indicate other 

 than a direct Papuan origin, unless the generic links have 

 been weakened and the species rapidly evolved under the 

 different conditions of Southern Australia. In the con- 

 cluding part of this paper it is considered they have been 

 evolved under the special Australian conditions. 



The greater number of Passerine genera of area 3 

 over area 2 (Table l.=z'/ per cent.) may be marked of 



(2) Bathilda, Poephila, Pseudogcrygone, Poecilodryas, and 

 Plectrorhynchns. 



(3) Sericornis, Acantljiza, Ploceid^e, Psittaciformes. 



