PEIONOPID^E. 
to the exact resemblance in habits. I have been unable to find any remarkable 
difference in structure in any way and as above noted the colour changes 
are of the same nature. A family Pachycephalidce would easily include all 
the forms from Australia that have been classed in Colluricinda and probably 
study of more material, showing plumage change along with that of the 
pterylosis and osteology, would cause the attachment of others. 
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