EXPLANATION OP PLATE XVIII. 



rig. 1. Ntcticoeax caledonicus, Latham. 

 Nankeen Night Heron. 



Fig. 2. Abdea pacifica, Latham. 

 Pacific Heron. 



Pig. 3. BoTATTETTS poiciLOPTEBTJB, WagUr. 

 Australian Bittern. 



Fig. 4. BuTOBOiDES PLAvicoLLis, Latham. 



Tellow-necked Mangrove-Bittern. 



Fig. 5. Demiegeetta sacba, GmeMn. 

 Blue Eeef Heron. 



Fig. 6. BUTOKOIDES MACEOBHYNCHA, Gould. 



Thick-billed Mangrove Bittern. 



