16 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



Indian Ocean off Western Australia by Pocklington, Willis, and 

 Palmieri (unpubl.). 



Phaethon aetliereus Red-billed Tropicbird 



In late January and early February this tropicbird was fairly common 

 in the western Arabian Sea east to 69°11' E and south to 11°01' N, 

 often very far from land (see table 10). In late May, five were seen 

 only 17°29' N, 62°31' E, and three at 02°02' N, 51°11' E. No other 

 species of tropicbirds were identified in this region. 



Phaethon lepturus White-tailed Tropicbird 



White-tailed tropicbirds were first encountered at 08°42 / S, 55°07' E, 

 on Feb. 17 and were not seen south of 24° S on this transect of the 

 cruise (see table 11). On the 75° E transect the first one was seen 

 at 16°42' S; we noted the species at only two of the remaining stations 

 to the north. Many white-tailed tropicbirds were present near the 

 the Seychelles Islands on June 2. 



Sula dactylatra Masked Booby 



Scattered individuals were seen in the southwestern Arabian Sea 

 and near the Seychelles Islands in January-February and again in 

 late May (see table 10). 



Sula leucogaster Brown Booby 



Four adults were seen near Socotra, one at 14°40' N, 55°25' E, on 

 Feb. 1 and three at 11°30' N, 52°53' E, on Feb. 4. 



Fregata ariel Lesser Frigatebird 



I saw this species only twice; three at 07°02 / S, 55°11' E, on Feb. 16, 

 and two near the Seychelles Islands on June 2. 



Lobipes lobatus Northern Phalarope 



Ten northern phalaropes were seen near the Indian coast (17°44' N, 

 69°11' E) on Jan. 27. 



Catharacta skua Skua 



A single individual was seen five miles west of Mauritius on Mar. 2. 

 Three skuas were observed at St. Paul Island on Apr. 7. 



Larusfuscus Lesser Black-backed Gull 



Several were seen near the Gulf of Aden, one on Feb. 2 and five on 

 Feb. 3. 



Larus hemprichii Aden Gull 



Two, possibly three, individuals were seen in the Gulf of Aden on 

 Feb. 1-2. 



