HORN-BILL. 311 



6— FLAT-CROWNED HORN-BILL. 



Le Calao a Casque plat, Leeail. Afr. v. cxxvii. pi. 240. 



OF this bird only the bill and head have come under observation ; 

 the bill is about six inches long from the point to the angles of the 

 mouth, moderately arched, and pointed at the tip ; the sides of the 

 mandibles a little dentated on the edges, formed somewhat in the 

 shape of that of the Indian Horn-bill. The colour deep vermilion ; 

 the helmet, or appendage, tends towards a pointed shape on the 

 forepart, is rounded behind, and quite flat above ; it is five inches 

 long, and two broad ; in shape altogether not ill resembling a heater 

 used in ironing linen ; nostrils placed at the base, between the bill 

 and junction of the helmet ; the head small in proportion to the bill. 



One of these was added to the collection of M. Levaillant, by 

 M. Fayol, but from whence it was brought by no means ascertained. 

 M. L. thinks it may possibly be a Bill of the Indian one in its most 

 complete state, or, at least, of the concave species. 



7— UNICORN HORN-BILL. 



Calao Unicorne, Levail. ois. de V Am. Sf Ind. i. p. 27. pi. 9. 10. 

 Buceros Malabarieus /3. Ind. Orn: i. p. 143. 



THIS is about thirty inches in length ; the bill is large, being 

 nine inches long, and almost five in thickness, taking in the helmet, 

 which alone is two inches and a half; the edges of the mandibles are 

 toothed ; the helmet proceeds forward, curving over the point of the 

 true bill, and tending to a point in like manner, and sometimes 

 approaches near to the end of it ; it is undulated three or four times on 

 the sides, otherwise the sides are flat and smooth ; the base of the 



