

General plumage grey, darkest on top of head, paler on breast, and becoming almost white on 

 abdomen and lower tail-coverts. Ear-coverts plumbeous. Back pearly grey with a pinkish tinge. 

 Primaries and secondaries brownish black, tipped broadly with white. Inner secondaries pearly 

 grey with a pinkish tinge. The first three primaries with a white line on their outer web near the 

 centre. Tail pale rufous, with a subterminal blackish-brown bar, and tipped with white. Bill has 

 the anterior third part of the culmen and tips, together with the underpart of mandible, yellowish 

 white, rest black. Casque low, greatly compressed ; ridge extending for two thirds the length of 

 the culmen, to which it returns at a very acute angle, forming a sharp point on the end of the 

 casque. The posterior portion does not extend over the head, and is hidden in the feathers. Iris 

 red-brown, feet plumbeous. 



Total length 21 inches, wing 8, tail 10, bill 4^, casque 2J, tarsus If. 



I desire to acknowledge my indebtedness to Lord Tweeddale for the loan of the specimens 

 described and figured. 



