490 MR. P. L. SCLATKR ON ANIMALS IN THE MENAGERIE. [May 16, 



to make a closer comparison between them and the bird recently 

 described under the name above given from the specimen living in 

 our Gardens. 



Fig. I. 



Head of Biiceros subcylindricus 



Buceros cylindricus is at once distinguishable by the peculiar form 

 of the elevated casque, which is correctly figured by Temminck (PI. 

 Col. 521. fig. 2), and by the white tail being completely crossed by a 

 black median band. Our bird, as regards the form of its bill, is, as 

 shown by the sketch, much nearer to B.fistulator ; but the culmen 

 is more elevated than in B.fistulator, and the lower mandible not so 

 strong. Moreover, in B.fistulator the culmen and tip and tbe base 

 of the lower mandible are white ; in our bird the whole bill is black. 

 Again, in B.fistulator there are no signs of the terminal edgings on 

 the crest, and the outer secondaries are black instead of white. 



As far as I can at present make out, B. subcylindricus is distinct 

 from both of these and from every other described species. 



28. Cacatua gymnopis, sp. nov. 



We have now placed next together in the Parrot-house three 

 living specimens of three nearly allied species of the group of 

 smaller white Cockatoos, the determination of which has caused me 

 some little trouble, though they are obviously very distinct. 



In the first of these birds (fig. 2), purchased April 11, 1864, 

 being one of the individuals described in my notice, P. Z. S. 1864, 

 p. 187, and figured pi. xvii., there is no trace whatever of red colour 



