110 PERCY SLADEN TRUST EXPEDITION. 
Reef. They were apparently collecting for breeding-purposes at the beginning of October 
1905, their nests being placed in the low mapou (Pésonia) and tanghain shrub covering 
the island. They were also seen at Farquhar, Alphonse, and the Amirantes. The 
evano of Bird Island, Seychelles, was principally formed by a g:eat colony of this species. 
35. Pelecanus crispus. 
These large birds were found breeding in a colony in the coconut and other large trees 
of the eastern island of 8. Joseph Atoll, Amirante Group. Young birds were seen in 
October 1905. 
36. Phaéthon lepturus=flavirostris. Tropic-bird. 
A single pair of these birds were seen on Diego Garcia, Chagos, where they were 
stated to have bred for some years in a large mapou (Pisonia) tree. 'Tropic-birds were 
next seen in the Seychelles, fiying around the mountain-summits of Mahé. 
37. *Fregata ariel, Smaller Frigate-bird. 
Nelson Island, to the north of the Great Chagos Bank, is a regular breeding-place for 
these birds, the eggs and young being often taken in December and January by boats 
from Salomon Atoll. From thence they are daily visitors to every island of the Chagos 
Archipelago, always apparently returning at night. 
