Order II. PASSERES. 
Tribe IV. Conirostees. 
The seventh Family, 
BUCEROTID.E, or Hornbills, 
have the BiU more or less lengthened, curved, broad at the base, and compressed to the end ; with the 
culmen furnished -with a singularly formed helmet, or only curved to the tip, which is acute ; the Nostrils 
basal, and usually rounded : the Wings moderate : the Tail generally long, broad, and more or less 
graduated : the Tarsi, in most, short and strong : the Toes moderate, strong, and more or less united at 
their base, especially the outer toe : the Claws short, and rather obtuse. 
The only Subfamily, 
BUCEROTIN.E, or Hornbills, 
have similar characters to those given above. 
EuuYCEROS Less.* 
Bill large, and broad at the base, with the culmen much elevated, projecting on the forehead, keeled, 
and curved to the tip, which is hooked and strongly emarginated ; the sides much compressed from the 
base to the end ; the gonys rather short, and ascending ; the nostrils lateral and basal, with the opening 
rounded and exposed. W{?igs long, with the fourth and fifth quills equal and longest. Tail moderate, 
broad, and rounded. Tarsi moderate, rather strong, and covered in front vrith transverse scales, the 
divisions of which are slightly apparent. Toef long ; the inner shorter than the outer toe, the latter 
united to the first joint ; the hind toe long and strong ; the claws long, strong, curved, and acute. 
The type of this geuus is found in ^Madagascar. Its manners and habits are unknown. 
E. Prevostii Less. Cent, de Zool. t. 74., Illustr. tie Zool. t. 13. 
* Established by M. Lessou in 1830 {Centurie de Zoologie). 
