APPENDIX. 439 



XXVI. 



The Pel. sula, L., The Brown Booby, Enl. 973, is the Sulafusca, 

 Briss. 



XXVII. 



Closely allied to the genus Plotus is the Heliornis 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 whitishj 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 whitej sides of the 

 neck and back speckled with black; bill and feet red; toes connected 

 only at the base; tail cuneiform. 



