516 BULLETIN IS 8, UNITED STATES NATIONAL MUSEUM 



to many nominal species. Two local species are recorded, which may 

 be differentiated as follows : 



la. Head deeper than long ; profile in front of eyes snbvertical ; head and body 

 green, with 5 irregular scarlet cross bands on head and about 5 scarlet 

 longitudinal bauds on body interspersed with scarlet spots on back; a black 

 spot at upper end of gill opening ; i)ectorals and ventrals uniform green ; 

 dorsal, caudal, and anal fins green at base, yellow distally ; head and body 

 may lack red bars, all fins may be plain green, and black spot at upper end 

 of gill opening may be absent verticalis 



16. Head about as long as deep ; profile in front of eyes strongly arched but not 

 subvertical; head and most of body red, back and caudal peduncle dark 

 brown or reddish brown ; head with about 6 narrow wavy cross lines of 

 silvery blue, a straight silvery blue line from origin of first dorsal fin across 

 pectoral base; all fins reddish brown; a pale line at bases of dorsal and 

 anal fins rivulatus 



GOBIODON VERTICALIS Alleyne and Macleay 



Plate 8, a, & 



Qobiodon verticalis Atjeyne and Macleay, 1877, p. 333, pi. 12, fig. 4 (New 

 Guinea).— Smith, 1933a, p. S3 (Gulf of Siam). 



Originally described from New Guinea, this species is now known 

 from Australia, Polynesia, and the Gulf of Siam. 



Of four specimens, 2.5 to 4 cm. long, taken by the writer in coral 

 heads at Koh Tao, the two largest, 3.5 and 4 cm. long, were uniformly 

 green with red bands on head and body, while the two smallest, 2.5 

 and 2.8 cm. long, possibly females, were uniformly green without any 

 red bands. Another lot, collected by Masya Chitrakarn and Boon 

 Chuay Indrambarya among corals on Koh Kahten, comprised seven 

 specimens, 3.5 to 4 cm. long, all of which showed red bands on head 

 and body. 



GOBIODON KIVULATUS (Ruppell) 



Plate 8, c 



Gobius rivulatus RiJppELL, 1828, p. 138 (.Tubal Island, Abyssinia). 

 Gobiodon rivulatus Smith, 1933a, p. 82 (Gulf of Siam). 



Hanging from the Red Sea and Madagascar to Australia, Polynesia, 

 and China, this species was to be expected in Thailand waters. A lot 

 of eight specimens was collected by the writer in coral heads at Koh 

 Tao, Gulf of Siam. Two of these specimens were removed from a 

 coral clump that had been snagged at a depth of 30 meters. One fish, 

 placed in a bottle of sea water, adhered to the glass, head downward, 

 by its small ventral fins serving as a sucking disk. Other specimens 

 have been taken at Koh Kahten. 



The maximum size represented by these specimens was 4 cm. 



