ORNITHOLOGY OF THE COASTS AND ISLANDS, ETC, 
are known in Western Africa, Nettapus madagascariensis de- 
serves particular mention, as well as the American Dendrocygna 
viduata, the specific difference of which, as A. personata (Duke of 
Wiirtemburg), we, after careful comparison of Brazilian and Sene- 
gambian specimens, cannot allow. That South Africa, so searce 
in water, should be richer in Ducks than the region of the west 
coast, so full of Iakes and rivers, is not easily explained; yet: the 
more moderate climate of the former—more consonant to the 
Anatide must certainly not be overlooked as a cause. Although 
the new species of Sterne, described in Western Africa by Swair- 
son should be added, it is at least doubtful with regard to one 
of these. Perhaps it is only accidental that no species of Podiceps 
has yet been found there. 
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