576 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



tion of the specimen is given except as to the flatness of the inter- 

 orbital space ; but the figure of a specimen 6 cm. long shows peculiar 

 dark markings on head, back, and side such as are wholly unknown 

 in the two color varieties of this species, immaculatus (unmarked) and 

 manillensis (with 6 to 12 narrow dark longitudinal lines extending 

 the entire length of the fish). As this form is otherwise unknown 

 from fresh water, there is doubt as to the identification. 



Three species, known definitely from Thailand, are set forth in the 

 following diagnosis : 



la. Body and head covered with an irregular network of thin dark lines, some 

 of the meshes enclosing black spots; dorsal fin arising far in advance of 



anal fin palembangensis 



1&. Body and head more or less covered vpith dark spots, dorsal fin arising over 

 or slightly in advance of origin of anal fin. 

 2o. Entire head and body except middle of abdomen covered with small, round, 

 crowded black spots larger posteriorly; some or all of the spots may 



have a narrow light edge ; no cross bands on caudal fin leiurus 



2&, Back, upper part of head, and side more or less thickly covered with large 

 dark spots, mostly circular; about 6 narrow dark cross bars on 

 caudal fin fluviatilis 



TETRAODON PALEMBANGENSIS Bleeker 



Tetraodon palemiangensis Bleekeb, 1852 (62), p. 25 (Palembang, Sumatra). — 



HoEA, 1923b, p. 183 (Nontaburi) ; 1924a, p. 499, fig. 9 (inner lake of Tale 



Sap). 

 Tetrodon palembang ensis Gunthee, 1870, vol. 8, p. 288 (Siam). — KAboli, 1882, 



p. 187 (Siam).— FowLEE, 1934b, p. 351, fig. 13 (Krat) ; 1935a, p. 163 



(Srisawat). 

 Tetraodon paleniengensis Satjvage, 1883b, p. 155 (Menam Chao Phya). 



This is a strictly fresh-water species, found in the rivers of Borneo, 

 Sumatra, and Thailand, and also in lakes in the Peninsula. 



The British Museum contains a specimen collected in Thailand by 

 Mouhot and noted in Giinther's Catalogue. Other local records are 

 indicated in the synonymy. Hora (1924a) reported five young speci- 

 mens from the inner lake of the Tale Sap and figured two color phases 

 that agree with young specimens referred to by Hora (1923b) from the 

 Menam Chao Phya, collected by Dr. Malcolm Smith. An interesting 

 specimen, taken in the Tale Noi, September 28, 1927, by Masya and 

 Suvatti, of the Siamese Bureau of Fisheries, was 19 cm. long and 

 exhibited large black meshes on a yellow background, some of the 

 meshes enclosing black spots. 



The fish is easily recognizable by the network of narrow blackish 

 lines completely covering the head and body. 



The name given to the fish by the local fishermen was pla pak pao 

 nam chuet {nam ehuet^ fresh water) . 



