Norwich Castle Museum. 39 
Case XIII. 
contains some beautiful crested Hawk Eagles of the 
genus Zimnaétus ; one species, LZ. caligatus, the change- 
able Hawk Eagle, represented in its melanistic as well as 
in its normal phase. Gurney’s Hawk Eagle, in 
Case XIV., 
the type specimen, named by J. E. Gray, in honour of 
the late Mr. Gurney, is still a rare species, and was 
at the time it was acquired to be found in only one 
other public collection; we now possess four speci- 
mens, one having been added since Mr. Gurney’s 
death; the Occipital Hawk Eagle, a handsomely- 
crested bird, will also be observed, it is remarkable 
for the extraordinary development of the occipital 
feathers, greater in proportion to the size of the bird 
than in any other Hawk Eagle. . 
Case XV. 
also contains some imposing-looking species, amongst 
them the Crowned Hawk Eagle, one of the largest and 
most destructive Hawk Eagles of the Old World. 
She female, No. 2, was shot by Mr. YT. Ayres, of 
Natal, just after it had killed a large monkey. 
Case XVI. 
contains three fine Harpy Eagles of tropical America. 
They are great destroyers of monkeys, fierce-looking, 
with wonderfully powerful feet and talons, and are 
perhaps the most formidable birds in existence. 
Next follow the Buzzard Eagles, a large group of a 
much feebler type. but some of them very handsome 
birds ; they extend through 
