506 BULLETIN 1S8, UNITED STATES NATIONAL MUSEUM 



Indies, Philippines, and other localities), has been reported by Fowler 

 for Bangkok and Tachin from a number of specimens 6.6 to 15.6 cm. 

 long. This fish is of a very retiring habit, and lies quietly on the bot- 

 tom when not in search of food. 



A length of 25 cm. is reported from other waters. 



Genus BOSTRICHTHYS Dumeril 



Bostrichthys Dumeril, Zool. Anal., p. 120, 1806. (Type, Bostrychus sinensis 

 Lacep^de. ) 



BOSTRICHTHYS SINENSIS (Lacepedc) 



Bostrychus sinensis Lacepede, 1802, vol. 3, p. 141, pi. 14, fig. 2 (China). 

 Bostrichthys sinensis Suvatti, 1936, p. 149 (upper Bangpakong River). 



This is an extremely widespread species in the Pacific and Indian 

 Oceans. On the mainland of Asia it ranges from China to Malaya. 

 In Thailand it has not been often reported or recognized, and the only 

 definite records are for the lower Menam Chao Phya in the Bangkok 

 district and the upper Menam Bangpakong. 



A length of about 16 cm. is attained in local waters. 



The fish may be recognized by its brown body color marbled or 

 streaked with darker brown, its large black white-edged caudal ocellus, 

 its very small scales (up to 140 in longitudinal series), and its fine teeth 

 in a band in each jaw and in a semioval patch on the vomer. 



Genus BUTIS Bleaker 



Butis Bleekee (453), Arch. Neerl. Sci. Nat., vol. 9, p. 304, 1874. (Type, Butis 

 iutis (Bleeker) =Chcilodiptertis butis Hamilton.) 



BUTIS BUTIS (Hamilton) 



Cheilodipterus hutis Hamilton, 1822, pp. 57, 367 (Calcutta). 



Butis melano stigma Bleekee, 1865 (347), p. 34 (Siam) ; 1865 (356),p.l74 (Siam>. 



Eleotris butis Sauvage, lS83b, p. 151 (Menam Chao Phya). 



Butis butis HoRA, 1923b, p. 179 (Nontaburi, Bangkok ) .—Fowler, 1934a, p. 157 



(Bangkok) ; 1935a, p. 160 (Bangkok, Paknam, Keng Sok) ; 1937, p. 248 



(Bangkok, Tachin) ; 1939, p. 53 (Krabi). 



From the Indo- Australian Archipelago and the Philippines, this 

 species ranges to Malaya, Thailand, and India, in salt, brackish, and 

 fresh water. In Thailand it has been found along the shores of the 

 Gulf of Siam from Patani to Chantabun, often pushing its way into 

 streams but never going very far from their mouth. Nontaburi on the 

 Menam Chao Phya is about as far inland as the fish has been detected. 

 Other rivers in which it has been collected are the Tapi near Bandon 

 and the lower Bangpakong. 



