484 BULLETIN 18 8, UNITED STATES NATIONAL MUSEUM 



obtained in the inner lake of the Tale Sap at Pak Bhayoon, in the 

 Peninsula. More recently Fowler has reported it from the Chao Phya 

 and Tachin Rivers in the Central district. The species, while pri- 

 marily marine, regularly enters fresh water. 

 A maximum length not exceeding 7.5 cm. is reported. 



CHANDA BURUENSIS (Bleeker) 



Amhassis burnetisis Blekker. 1856 (151), p. 396 (Boeroe). — Fowler, 1935a, 

 p. 146 (Bangkok, Keng Sok). 



The only record for this fish in Thailand is that given by Fowler, 

 based on three specimens 3.5 to 4.1 cm. long from Bangkok and 

 Keng Sok. The species is otherwise known from Malaya, Philippines, 

 Sumatra, Celebes, and other islands in the Indo-Australian Archi- 

 pelago. 



Family LOBOTIDAE 



Genus DATNIOIDES Bleeker 



Datnioides Bleeker (85), Nat. Tijdschr. Nederl. Indie, vol. 5, pp. 428, 440, 1853. 

 (Type, Coins polota Hamilton.) 



The systematic position of this genus has been viewed differently 

 by various ichthyologists. Giinther placed it in the Pristipomatidae ; 

 Boulenger, Bridge, Jordan, and Weber and de Beaufort in the Lobo- 

 tidae ; and Herre and Myers in the Theraponidae. 



Only two species are recognized, from streams and lakes of India, 

 Burma, Thailand, Indo-China, Malaya, and the Indo-Australian 

 Archipelago. They are as follows : 



la. Scales in lateral line about 70 ; rows of scales between origin of dorsal fln 

 and origin of venti-al tin about 10 to 12-1-20 to 23; branched dorsal 

 rays 13 or 14; body and head with 8 to 10 dark brown cross bands some 

 of which become confluent with age ; a dark round spot on 

 opercle quadrifasciatus 



1&. Scales in lateral line about 105 ; rows of scales between origin of dorsal fin 

 and origin of ventral fin about 20-1-40; branched dorsal rays 15 or 16; 

 body and head with black cross bands, which remain distinct at all ages ; 

 no round dark spot on opercle microlepis 



DATNIOIDES QUADRIFASCIATUS (Sevastianov) 



Chaetodon quadrifasciatus Sevastianov, 1809, p. 448. 



Datnioides polota Bleeker, 1859-60 (239), p. 101 (Siam) ; 1865 (356), p. 173 

 (Siam).— FowiER, 1935a, p. 148 (Bangkok) ; 1937, p. 236 (Bangkok) ; 1939, 

 p. 49 (Krabi). 



Datnioides quadrifasciatus Bleeker (301), vol. 8, 1876-77, p. 32 (Siam). — Hora, 

 1923b, p. 176 (Nontaburi) ; 1924a, p. 486 (Tale Sap).— Webee and de Beau- 

 fort. 1936, vol. 7, p. 462 (Peninsular Siam).— Koumans, 1937a, pp. 63, 64 

 (Tale Sap). 



The range of this species extends from Ganges to Burma, Thailand, 

 Malaya, and the Indo-Australian Archipelago, in the lower courses 



