324 
ON THE CLASSIFICATION OF BIRDS. 
SuBFAM. CROTOPHAGINiE. Hornbill Cuckows. 
Crotopiiaga, Linn. Bill very broad on the sides. The 
culmen high, and forming an elevated ridge or keel 
vrhich divides the frontal feathers, 
sulcirostra. Parts. No. 124. rugirostra. Ib. No. 123. 
Isevirostra. lb. No. 122. seinisulcata. Ib. No. 194. 
Basylophds, Sw. (Jig. 286. a) Bill rather large, com- 
pressed its whole length. Gonys angulated. Culmen 
convex, gradually arched. Frontal feathers incumbent, 
and concealing the nostrils. Feathers before the 
eye erect, forming a double crest. 
L). superdliosus. Sw. 
PHotNicopUAtus, Vieillot. (fg. 286. c) Bill large, very 
thick, smooth, resembling thatof a toucan in miniature. 
Face naked. Nostrils basal, oval, close to the rictus, 
placed in a groove of the biU, and defended by stiff 
erect bristles. 
P. viridis.0.d’Af.pl.22S. pyrrhocephalus.Vieil.GaI. pl.37. 
SuEFAJi. LEPTOSTOMINAJ. Long-billed Cuckows. 
Saiikothera, Vieillot. (fig. 286. 6) Bill lengthened, 
longer than the head, straight, except towards the 
tip : the culmen convex. Gonys straight. The 
upper mandible with its margins finely crenated. 
Orbits naked. Wings moderate; the second and 
diird quills the longest. Feet short. (Vieillot.') 
S. velata. Vicil. Gal. pi. 38. 
An.ada!Nus, Sw. General structure of Saurothera ; but 
the upper mandible is only notched at the tip : the 
margins entire. Wings much rounded ; the four first 
quills graduated. India. 
A. rufescens. Parts. No. 193. 
