608 BULLETIN 1S8, UNITED STATES NATIONAL MUSEUM 



The fishermen appl}^ to the fisli several distinctive names. On the 

 Paknam Wain Eiver, in Southeastern Thailand, the name pla chon 

 nam hem (salt-water serpent-head fish) is apt, as the fish bears a 

 strong superficial resemblance to an OphicephalU'S. In the Chantabun 

 section of Southeastern region, a vernacular name pla makua has refer- 

 ence to a local fruit (guava) with somewhat the same shape. At 

 Yamoo in Patani Province a name reported is pla hu hua man (fat- 

 head goby). 



In his paper on fishes of the Tale Sap, Hora doubtfully records as 

 Ophioeara amhoiemsis (Bleeker) a fish only 17 mm. long. 



Genus OXYELEOTRIS Bleeker 



Oxyeleotris Bleekek (453), Arch. N^erl. Sci. Nat., vol. 9, p. 302, 1874. (Type, 

 Eleotris marmorata Bleeker.) 



The genus Oxyeleotris^ established by Bleeker in 1874, with 0. mxir- 

 moratus as the type, is represented in the Thailand fauna by three 

 fresh-water species as follows : 



la. A large black light-edged ocellus at upper base of caudal fin. 



2a. Scales in longitudinal series 70 to 75 ; predorsal scales about 30 ; no barbel 



on upper jaw; snout scaly; general color dark green urophthalmus 



2&. Scales in longitudinal series 90; predorsal scales 40; a short barbel on 

 upper jaw ; snout unsealed ; general color brown, whitish below ; 2 



oblique dark stripes radiating from eye on cheek siamensis 



16. No ocellus at base of caudal fin ; scales in longitudinal series 70 to 90 ; 

 general color yellowish, marbled with brown in large pattern ; brown 

 stripes along rows of scales marmoratus 



OXYELEOTRIS UROPHTHALMUS (Bleeker) 



Eleotris urophthalmus Bleekee, 1851 (45), p. 202 (Bandjermassing, Borneo) ; 

 1865 (347), p. 34 (Siam) ; 1865 (856), p. 174 (Slam).— Satjvage, 1883b, p. 151 

 (Menam Chao Phya). 



Described from fresh water in rivers at Bandjermassing, Borneo, 

 and later recorded from rivers of New Guinea, this species was re- 

 ported from Thailand by Bleeker in 1865. The only other reference 

 to the fish in Thailand waters is that by Sauvage (1883b), who lists 

 it as being represented in a collection made in the Menam Chao Phya 

 by Dr. Harmand. The species has not been recognized in Thailand 

 in recent years. 



The two specimens on which Bleeker based the species in 1851 were 

 11 and 14 cm. long. 



This fish resembles O. siamensis in having a black light-edged ocel- 

 lus at the upper base of the caudal fin. The apparent difi'erences as 

 brought out in the description by Bleeker are the fewer scales in the 

 longitudinal series, scaly snout, absence of a small barbel on each side 

 fii the upper jaw. 



