66 Aphanapteryx of Mauritius and Chatham Islands. 
have not yet been found. I have figured (fig. 1) therefore 
only the portion of A. Hawkinsi corresponding to that known 
of A. Broecki. It will be observed that, except in size, the 
premaxille in the two forms agree very closely together. 
‘The same, indeed, may be said of the humeri. ‘The humerus 
of A, Hawkins (fig. 3) differs from that of A. Broecki (fig. 4) 
only in being somewhat larger and stouter. The sternum of 
the former (figs. 5 and 7, in its ventral and lateral aspects 
respectively) is much more perfect than that of the latter, 
whose anterior lateral processes and posterior portion (figs. 6 
and 8) are all wanting. 
I think it will be generally conceded by those ornitho- 
logists who compare the four pairs of drawings here given that 
