510 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



Genus VALENCIENNEA Bleeker 



Valenoiennea Bleekeb (390), Versl. Meded. Akad. Wet. Amsterdam, vol. 2, p. 275, 

 1868. (Type, Eleotris hasselti Bleeker.) 



VALENCIENNEA MURALIS (Cuvier and Valenciennes) 



Eleotris muralis CuviE2i and "Valenciennes, 1837, vol. 12, p. 253, pi. 357 (Tukopia). 



Thailand is included in the very wide range of this goby, which 

 extends from India to Australia, East Indies, Philippines, and some 

 of the islands of the Fiji and Samoan groups. In local waters the 

 fish has not been found to be common, and the few local records are 

 from Southeastern Thailand. Two specimens, 5.6 and 5.7 cm., were 

 taken by the writer in March 1930 in a tide pool in the Chantabun 

 Estuary, and one specimen of 6.4 cm. was obtained by H. G. Deignan in 

 May 1937 in a tide pool on Koh Chang. 



Genus PTERELEOTRIS Gill 



Ptereleotris Gill, Proc. Acad. Nat Sci. Philadelphia, 1863, p. 271, 1864. (Type, 

 Eleotris microlepis Bleeker.) 



Among the eleotrid gobies this genus stands out prominently because 

 of very numerous rays in the anal and second dorsal fins, the rays 

 being described as undivided ; the body covered with minute cycloid 

 scales (150 or more in longitudinal series), with the head scaleless; 

 one or two jDairs of postsymphyseal canine teeth in the lower jaw; and 

 caudal fin either truncate or emarginate. 



The genus was named by Gill in 18G3, with Eleotris microlepis 

 Bleeker designated as the type. In the first description of the genus, 

 given by Bleeker in 1874 (453), an important feature is the nondivided 

 condition of the anal and second dorsal soft rays. Herre (1927, p. 83) 

 reaffirms this peculiarity of the genus but in his figure of a new species 

 (dispersus) from the Philippines he shows all those rays fully divided. 



Two species are ascribed to Thailand : 



la. Second dorsal and anal rays 26 to 29 ; an oblique black stripe at base of lower 

 pectoral rays; no black spot on base of caudal fin microlepis 



15. Second dorsal and anal rays 19 or 20 ; no black stripe at base of pectoral rays; 

 a roundish jet black spot on base of median caudal rays stigmaturus 



PTERELEOTRIS MICROLEPIS (Bleeker) 



Eleotris microlepis Bleeker, 1856 (149), p. 102 (Banda). 



Originally described from the East Indies, this species was subse- 

 quently reported from east Africa (Play fair, 1866, p. 75, pi. 9, fig. 5) 

 and is herein noted from Thailand. On March 10, 1926, on an exposed 

 tide flat on the island of Pipidon, off the west coast of Thailand in 

 the Bay of Bengal, the writer found several specimens under a stone 

 in company with a holuthurian and ophiurans. 



