FRESH-WATER FISHES OF SIAM, OR THAILAND 533 



ACENTROGOBIUS NEBULOSUS (Forskal) 



Gobius nebulosus Fokskal, 1775, p. 24 (Djedda, Red Sea). — Fowler, 1939, p. 53 

 (Krabi). 



Under the name Gohiits nebulosus Forskal, a species described from 

 the Red Sea, Fowler listed three specimens, 8.6 to 9.5 cm. long, taken in 

 September 1936 at Krabi, Peninsular Siam. The extension of the 

 predorsal scales into the interorbital space of these specimens suggests 

 their position in the present genus rather than in Rhinogohius (or 

 Ctenogobius) where Forskal's species vras assigned by Jordan and 

 Scale and Jordan and Richardson. It would appear that the present 

 fish is not conspecific with Rhinogohius nebulosus Jordan and Scale 

 (1906, p. 401 ; 1907, p. 41), and Jordan and Richardson (1908, p. 276) ; 

 with Rhinogohius lungi Jordan and Scale (1907, p. 41), a synonym 

 of nehulosus according to Jordan and Richardson (1908); and with 

 Gohius criniger Cuvier and Valenciennes (1837), which was made a 

 synonym of nehulosus by Jordan and Seale (1906) and Jordan and 

 Richardson. In view of the deficiencies in Forskal's description, more 

 particularly as regards squamation and dentition, the species nehulosios 

 cannot with certainty be given a generic assignment. 



Genus AMBLYGOBIUS Bleeker 



AmUygoUus Bleekeb (453), Arch. N§erl. Sci. Nat., vol. 9, p. 322, 1874. (Type, 

 QoMus sphinx Valenciennes.) 



AMBLYGOBIUS PHALAENA (Cuvier and Valenciennes) 



Gobius phalaetia Cuvieb and Valenciennes, 1837, vol. 12, p. 92 (Vanikolo). 

 Ambly gobius phalaena Smith, 1933a, p. 82 (Gulf of Siam). 



Widely distributed in the eastern Pacific, this species is known from 

 Thailand by a few specimens taken about islands in the Gulf of Siam, 

 several at Koh Sichang and one at Koh Pa-ngan. 



Length, 9 cm. or less. 



Genus GNATHOLEPIS Bleeker 



Gnatholepis Bleeker (453), Arch. N6erl. Sci. Nat., vol. 9, p. 318, 1874. (Type, 

 Gobius anjerensis Bleeker.) 



GNATHOLEPIS CALLIURUS Jordan and Seale 



Gnatholepis calliurus Jokdan and Seale, 1905, p. 796, fig. 14, 1905 (Negi'os, 

 Philippine Islands).— Smith, 1931d, p. 189 (Patani). 



Described from the Philippines in 1905 and later taken in British 

 North Borneo, this species was ascertained to inhabit Thailand when, 

 in 1927, a pair were taken in the Gulf of Siam at Patani, in Penin- 

 sular Thailand. The fish attains a length of 4 to upward of 7 cm., 



590087 — 45 35 



