In the north it is influenced, of course, by its proximity to Papuasia, whence there is a considerable admixture of genera which do not proceed beyond the tropics, and of these Casuarius is a striking example.
Casuarius and Dromaeus, Australian.
Rothschild's Monograph of the Genus Casuarius (1899, quarto); R.
A diagnosis covering all the Ratitae (struthio, rhea, casuarius, dromaeus, apteryx and the allied fossils dinornis and aepyornis) would be as follows - (i) terrestrial birds without keel to the sternum, absolutely flightless; (ii) quadrate bone with a single proximal articulating knob; (iii) coracoid and scapula fused together and forming an open angle; (iv) normally without a pygostyle; (v) with an incisura ischiadica; (vi) rhamphotheca compound; (vii) without apteria or bare spaces in the plumage; (viii) with a complete copulatory organ, moved by skeletal muscles.
CASSOWARY (Casuarius), a genus of struthious birds, only inferior in size to the emeu and ostrich, and, according to Sir R.
The common cassowary (Casuarius galeatus) stands 5 ft.
The mooruk, or Bennett's cassowary (Casuarius Bennettii), is a shorter and more robust bird, approaching in the thickness of its legs to the moas.