APPENDIX, ‘ 439 
XXVI. 
The Pel. sula, 1... The Brown Booby, Enl. 973, is the Sula fusca, 
Briss. , 
XXVII. 
Closely allied to the genus Prorus is the Hexrornis of Vieillot 
which chiefly differs from it in having a shorter and slenderer bill, 
the edges of which are entire, not denticulate. But two species are 
known, the H. surinamensis, Enl. 893. Brown, beneath*whitish; sides 
of the neck striped with black and white; bill and feet dusky, the 
latter semi-palmate and barred with black. The other is the H. 
senegalensis, Vieill. Gal. 280. Brown, beneath white; sides of the 
neck and back speckled with black; bill and feet red; toes connected 
only at the base; tail cuneiform. 
