Genus— H ARRISORNIS. 
Harrisornts Mathews, Austral Avian Record, Vol. II., 
p. 110, 1914 .. .. . . .. .. . . Type H. lathami. 
feMAEL Kakatoeine birds of dark coloration, swollen keeled bill, long wings, 
long tail, and small legs and feet. 
The crest is less developed than in the preceding genus, while the bill 
is more swollen and keeled ; the cere is feathered. 
The tip of the upper-mandible is very short, the edges simply sinuate, 
no pronounced toothing being apparent. The under-mandible is much more 
swollen, with the outer face very broad, not much exceeded by length of 
side, a broad deep sinus apparent. The figures given will complement this 
description. The lores are naked and the space round the eye bare. 
The wing has the fourth primary longest, the third longer than the fifth, 
which is about equal to the second, while the first is longer than the sixth 
though shorter by far than the fifth : all these primaries are scalloped. 
The tail is proportionately like that of the preceding genus. 
The feet are very small : the tarsus is covered with minute reticulate 
scales, as are the toes, save the first joint, which shows regular scales, 
though tending to break up into reticulations. 
When I introduced the genus-name Harrisornis, I wrote : “ Differs from 
Calyptorhynchus in having a distinct sharp keel to the culmen : and although 
the smallest of the black cockatoos has the widest bill, the lower mandible 
being particularly noticeable, being bigger than that of C. inacrorhynchus 
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