FRESH- WATER FISHES OF SI AM, OR THAILAND 525 



Koumans (1935) that 'Waitea mystacma of Jordan and Seale (1906) 

 from Samoa is the same species cannot be accepted. As has been 

 shown elsewhere (Smith, 1941b), the genus Waitea of Jordan and 

 Seale is to be regarded as distinct from Mahidolia^ and the species 

 called Waitea mystacina has been given another name. 



The two gobies, 45 and 46 mm. long, described by Herre (1927, p. 

 208) from Panay under the name Waitea mystacina are believed to 

 be referable to the present species, whose range is therefore now 

 known to include Java, Thailand, and the Philippines. 



Genus OXYURICHTHYS Bleeker 



Oxyurichthys Bleeker (453), Arch. Neerl. Sci. Nat., vol. 9, p. 324, 1874. (Type, 

 Oxyurichthys delosso Bleeker.) 



OXYURICHTHYS MICROLEPIS (Bleeker) 



GoMus niicrolepis Bleeker, 1849 (15), p. 35 (Surabaya and Sumanap). 

 Oxyurichthys sp. (near niicrolepis) Hora, 1924a, p. 495 (Tale Sap). 



Known from Penang, Java, Madura, the China Sea, and the Philip- 

 pines, this very beautiful goby has been found to be common in the 

 Chantabun Estuary in Southeastern Thailand but does not appear 

 to have been detected elsewhere in that country with the possible ex- 

 ception of three young specimens collected by Dr. Annandale in the 

 Tale Sap and identified by Hora as probably representing the present 

 species. 



Collections in the Chantabun Estuary have included two in June 

 1926, 10.2 and 10.5 cm. long ; one in May 1927, 9.5 cm. long; one in July 

 1928; two in June 1931, 9.2 and 9.5 cm. long; and one in April 1933, 

 8.8 cm. long. 



Genus BATHYGOBIUS Bleeker 



BathygoUus Bleeker (491), Arch. N6erl. Sci. Nat., vol. 13, p. 54, 1878. (Type, 

 Oobius nehulopunctatus Cuvier and Valenciennes.) 



BATHYGOBIUS FUSCUS (Ruppell) 



Gobius fuscus Rtjppell, 1828, p. 187 (Red Sea). 

 BathygoHus fuscus Fowler, 1937, p. 250 (Paknam, Rayong). 



This fish has the distinction of being perhaps the most widely dis- 

 tributed of all Pacific gobies, known from Africa and India to the 

 East Indies, Hawaii, Samoa, and elsewhere in the South Pacific Ocean. 

 The contention that the species occurs in the Atlantic (Koumans, 

 1935) is not confirmed, although the genus is represented there by the 

 species soporator. 



On the coasts of Thailand the fish is common, and exhibits the great 

 variation in coloration that has been noted in other places. It shows 

 a tendency to push its way up streams, and is known from the Chan- 



