HYBRIDIS-M AMONG COCKATOOS. 13 



perch, measured 15 inches (381 mm.) from the crown of the 

 head to the tip of the tail. 



A crest was present consisting of short reddish -yellow or 

 orange feathers obviously representing the recurved sulphur- 

 yellow feathers of the crest of C. galerita. These feathers 

 were only 2'8 inclies (73 mm.) in length, and they were quite 

 straight and exhibited no tendency towards the recurved 

 condition seen in Cacatua. Thus, in the condition of the 

 crest, the hybrid stands between the male- and female-parent, 

 but somewhat nearer to the male. The short feathers of the 

 female corresponding to the crest-feathers of the hybrid are 

 red at their bases, and the colour of the crest of the hybrid is 

 clearly a mixture of yellow and red. 



The forehead of the hybrid Avas more prominent than in 

 the female- and less so than in the male-parent. 



The ear-coverts were pale yellowish-buff and did not differ 

 appreciably in colour from those of Lie metis nasica. 



The eye was large, and when the eyelids were wide open 

 the exposed area was 34 sq. mm., thus equalling, or even 

 slightly exceeding, the size of the eye in the male-bird. The 

 edge of the eyelids when open exhibited granulations, but 

 they were smaller and less regular than in C. galerita. Iris 

 very dark brown. 



The naked skin around the eye was oval in outline, and 

 was more or less intermediate in size (208 sq. mm.) between 

 that of the male and that of the female; but in this character 

 also the hybrid stands somewhat closer to the male- than to 

 the female-parent. The colour of this skin was of the palest 

 bluish-white, which was almost exactly intermediate between 

 the chalky white of the male and the pale blue of the female. 



The red colour of the lores of the female was converted 

 into a yellowish orange in the hybrid ; while the red colour of 

 the bases of the feathers of the head and neck was replaced by 

 a beautiful gold colour. 



Length of tail 7 inches (178 mm.). Under surface of tail 

 and wing sulphur-yellow. 



Bill dark horn-colour, but not quite so black as in C . 



