108 PERCY SLADEN TRUST EXPEDITION. 
18. Limosa lapponica. Bar-tailed Godwit. 
A single specimen from Farquhar ; seen also on Providence. 
19. Squatarola helvetica. Grey Plover. 
Only two specimens were obtained, an immature bird from Peros Banhos, Chagos, and 
an adult from Farquhar. It was observed also at Salomon, Chagos, and at Eagle Island, 
Amirantes. 
20. Agialitis cantiana=alexandrina. Kentish Plover. 
A single specimen from Providence; observed also in Farquhar. 
21. Dromas ardeola, Crab-Plover. 
Small flocks of four to ten of these birds followed the receding tide over every reef we 
visited. We saw one flock near Ile d’ Ambre, Mauritius, and one off Céte d'Or, Praslin, 
Seychelles. They are said to breed in the Chagos about the month of December, 
22. Sterna fuliginosa. Sooty Tern or “ Wide-awake.” 
93. Sterna anestheta. Panayan Tern. 
These two terns were constantly seen during September and October in the coral- 
islands to the north of Madagascar; they often came on board the ‘ Sealark,’ resting 
on the masts. The Wide-awake breeds in enormous numbers on the islands of Cargados 
Carajos, laying their single large eggs upon the ground within a foot or eighteen inches 
of one another. We took large numbers of eggs in August, but saw no young birds. 
The same species also breeds on certain rocky islets in the Seychelles. 
S. anestheta breeds on some of the islands of Providence and of the Amirantes. So 
far as our observations go, it never occurs on the same islands as S. fuliginosa, and 
indeed rather shuns the locality of its “ Fairs.” The same is also true to a large extent 
of S. melanauchen in respect to Gygis candida, and of Anous stolidus to A. leucocapillus, 
but these species may select different habitats (shore and trees) on the same island. 
Neither species was seen in the Chagos. 
24. Sterna bernsteint. 
Small flocks of these birds were seen on every island we visited and often met with at 
sea. We only brought specimens from Peros Banhos, Chagos, and Darros, Amirantes. 
It was never definitely found breeding, though two or three pairs appeared to be 
occupying certain trees in Ne Lubine, Egmont, Chagos. 
25. Sterna saundersi. Black-shafted Ternlet. 
Large numbers of these birds were seen on the southern islets of Providence, but not 
elsewhere. 
26. Sterna melanauchen. Black-naped Tern. 
Found over the whole Indian Ocean. It was found breeding on the trees of Yéyé, 
Peros, in June, its single egg balanced on the bare trunks of Youwrnefortia or the leat: 
bases of coconuts. On Providence and Farquhar it was, however, a shore-breeder. 
