394 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



26. Gill openings narrow, restricted to side above pectoral fins; adipose fin 

 very long, its base 3 to 4 times length of base of anal ; caudal fin small, 

 lunate ; dorsal fin with no osseous spine ; pectoral and ventral spines en- 

 larged and transversely striated to form an adhesive apparatus, lips 

 broad, reflected, and flattened to serve as sucking organ. Size small, in 



mountain streams Oreoglanis 



16. A thoracic adhesive disk formed of longitudinal folds of skin. Size small; 

 in mountain streams Glyptothorax 



Genus BAGARIUS Bleeker 



Bagarius Bleekee (91), Verb. Batav. Genootfich., vol. 25 (Bengal), p. 121, 1853. 

 (Type, Pimelodiis 'bagarius Hamilton.) 



BAGARIUS BAGARIUS (Hamilton) 



Pimelodus bagarius Hamilton, 1822, pp. 186, 378, pi. 7, flg. 62 (locality not 



given). 

 Bagarius yarreUi Boxjlengek, 1903, p. 303 (Patani River). 

 Bagarius sp. Vipttlya, 1923, p. 225 (Menam Chao Phya). 

 Bagarius bagarius Smith, 1930, p. 55 (Siam). — Fowlee, 1934a, p. 93 (Chieng- 



mai). 



This species, very striking in form and color, ranges from India, 

 Burma, Thailand, and French Indo-China to Sumatra, Borneo, and 

 Java, It occurs throughout the length and breadth of Thailand in 

 the larger streams, but is not found in abundance anywhere. Among 

 the localities from which specimens have been examined are the Me- 

 ping at Chiengmai, the Mekok (tributary of the Mekong) at Chieng- 

 rai, the Menam Nan, the Meklong at Kanburi and the east branch 

 (Kwe Yai) of the Meklong north of Kanburi, and the Patani. 



The species reaches a length in excess of 2 meters, but examples as 

 long as a meter are now rare in Thailand. 



It is a voracious and predatory fish. Although feeding primarily 

 on small fishes, it consumes also frogs and shrimps. In the Menam 

 Chao Phya it is said by Prince Vipulya to hide under logs and floating 

 houses. 



The vernacular name borne by the fish throughout Thailand is 

 pla kae. 



Genus GAGATA Bleeker 



Gagata Bleekes (1S9), Act. Soc. Indo-Neerl. (Siluri), vol. 4, pp. 35, 204, 1858. 

 (Type, Gagata typus Bleeker.) 



GAGATA CENIA (Hamilton) 



Pimelodus cenia Hamilton, 1822, p. 174, pi. 31, fig. 57 (Bengal). 



Inhabiting the rivers of India and Burma, this species has not here- 

 tofore been reported from Thailand, but its presence was to be ex- 

 pected in the Salwin basin. Five specimens, 7.6 to 8.1 cm. long, taken 



