4i6% NATURAL HISTORY Otf AFRICA. 
VIII. — Natatores. 
$4 Sterna, tern. Seven species ; two peculiar, 
and five in common with other countries. 
2. Larus, gull. Two species, neither of which 
are peculiar to Africa. 
3. Lestris. Two species, neither of which are 
peculiar to Africa. 
4. Procellaria, petrel. Six species ; but none of 
them are peculiar to Africa. 
5. Dromedea, albatross. Two species; but neither 
of them peculiar to Africa. 
6. Anas, duck. Ten species ; five peculiar, and 
five in common with other countries, 
7- Anser, goose. Six species; three peculiar 
and three in common with other countries. 
8. Pelicanus, pelican. Two species ; one pecu- 
liar, and one in common with other countries. 
9. Halieus. Six species ; three peculiar, and 
three in common with other countries. 
10. Dysporus. One species, which is peculiar 
to Africa. 
Phaethon. Two species, neither of which are 
peculiar to Africa* 
12. Plotus. Two species, which are peculiar to 
Africa. 
13. -Corymb us. One species, which occurs also 
in other countries. 7 
