416 CLASS AVES. 



HoRNBiLLS with protuberance on the bill. 



Rhinoceros Hornhill. (Buc. Rhinoceros.) Enl. 934. 

 Vaill. Cal. 1 and 2. B. Africanus, Vail. pi. I7, may 

 probably be a variety of age. B. Niger, according to 

 M. Temminck, is the same, badly preserved. 



Black ; dirty white, beneath ; protuberance on the bill 

 as large as bill itself, and turning upwards. Bird, 

 three feet and upwards long, from tip of bill to end 

 of tail. 



Unicorn Hornhill. (B. Monoceros.) Sh. Enl. 873. 

 VaiU. 9, 10, 11, and 12. 



Black, glossed with green and purple ; three outer 

 quills of wings and tail white ; the prominence on 

 the bill prolonged into a kind of horn. 



Great-hilled Hornhill. (B. Cassidix.) Tern. Col. 210. 



Bill, very large, bright yellow ; prominence on bill 

 very large, and senii-circular ; body, wings, and 

 thighs greenish shining black; top of head marron. 

 Celebes. 



Malabar Hornhill. (P. Malaharicus, Lath, or Alhi- 

 rostris.) Sh. Col. 14. 



Black above, with violet and green ; beneath white ; 

 first quills of the Aving, and three exterior tail fea- 

 thers, white ; helmet varying with age. Malabar, 

 Coromandel Coast. 



Trumpet Hornhill. {B. Buccinator.) Col. 284. 



Green, above ; belly and vent, white ; tail tipped with 

 white ; prominence, or bill, trumpet-shaped. Cape. 



