148 NILS GYLDENSTOLPE, ZOOLOGICAL RESULTS OF THE SWEDISH ZOOLOGICAL EXPEDITIONS TO SIAM. 
The Wiskered Tern is common in the inner parts of the Gulf of Siam and at the 
mouth of the Menam Chao Phaya river. 
At Koh Lak a single male specimen was obtained at an estuary on the 17th of 
December 1914. Along the coast of the Siamese Malaya I never observed it during my 
excursions. 
325. Sterna seena. SyKxes. — The Indian River Tern. 
& Koh Lak °/ 1914. L= 380 mm.; W = 260 mm.; T = 178 mm; C = 37,5 mm. — Irides: 
blackish brown. Bill: orange yellow with black tip. Legs: brick red. 
A single male specimen of the Indian River Tern was obtained at Koh Lak on the 
2nd of December 1914. The specimen is in winter plumage and was shot at a small 
estuary near the coast. 
When going down the Meh Ping river I once observed 3 specimens of a Tern but 
they were impossible to get into range and therefore I am unable to ascertain what species 
they belonged to. They, however, looked rather small for being Sterna seena SyKus 
and probably belonged to another species (Sterna melanogastra TEMM.?) 
326. Larus brunneicephalus. Jerp. — The Brown-headed Gull. 
Larus brunneicephalus: Gyldenstolpe I p. 70. 
A fairly common species in the inner Gulf of Siam during the cold season. 
Fam. Rallide. 
327. Amaurornis phenicura chinensis. Bopp. — The Chinese White-breasted 
Water-hen. 
Amaurornis phenicurus: Gyldenstolpe I p. 68; Gyldenstolpe II; Williamson I p. 48; Barton p. 108; Gairdner 
p. 152. 
Amaurornis phenicura: Robinson & Kloss p. 11; Grant p. 120. 
Gallinula phenicura: Gould p. 151. 
Porzana phenicura: Schomburgk p. 261. 
Erythra phenicura: Miller p. 438. 
Amaurornis phenicura chinensis: Robinson II p. 141; Robinson III p. 725; Gyldenstolpe HI p. 235. 
do Hat Sanuk *5/2 1915. L = 311 mm.; W = 164 mm.; T = 79 mm.; C = 38 mm.; Tarsus = 52 
mm. — Irides: crimson. Bill: greenish yellow. Frontal shield: plumbeous. Legs: brown. 
The White-breasted Water-hen found in Siam belongs to the same race which was 
described by BopparRt from Hongkong. As to the colouration it is rather similar to A. p. 
phenicura Forst. from Ceylon but is distinguished by its larger size and by having the 
upper parts of the body more olivaceous. 
I did not find this species very common in the parts of Siam visited by the Expe- 
dition, though it occurred in the Northern Provinces as well as in the Siamese Malaya. 
