338 



shorter than head. Osseous part of pectoral spine strong, 

 flattened, denticulated behind, as long as or longer than dorsal 

 spine. Villiform teeth in bands, those of the palate and the 

 lower jaw crescent-shaped. Violet greyish, underside lighter, 

 distal part of fins dark. Length 335 mm. 



Nomen indig. : Singaringan (Malay. Batavia, Palembang, 

 Djambi); Ririgi (Bantam); Sengat (Benkulen). 



Habitat: Java (Batavia, Sunter !, Bekassi !, Tulung agung!, 

 Tjiringin, Buitenzorg!, Perdana, Ambarawa, Kediri !, Surabaya, 

 Pasuruan); Sumatra (Benkulen, Padang, Priaman, Lahat, Palem- 

 bang!, Gunung Sahilan !, Taluk!, Ringat !, Djambi!, Serdang !, 

 Deli); Borneo (rivers Mahakam!, Barito, Kahajan, Kapuas, 

 Sambas, Baram). Malacca, Siam. 



In rivers and lakes. 



Note. M. cavasius has been recorded by Cuvier & Valen- 

 ciennes from Java and by von Martens from Borneo. We are 

 of Bleeker's opinion, that these authors confounded specimens 

 of M. nigriceps with M, cavasius. 



2. Macrones baramensis Reg. 



Macrones baramensis C. Tate Regan, Ann. Mag. Nat. Hist. (7) XVIII, 1906, p. 68. 



Depth of body 4 2 / 3 in the length, length of head 3 2 / 3 . Breadth 

 of head i 1 ^ in its length, its depth at occiput less than 3 /s its 

 length, diameter of eye 5. Snout '/ 3 the length of head, broad, 

 obtuse, slightly projecting beyond the mouth. Palatine bands 

 of teeth confluent with the small vomerine patch. Nasal barbel 

 nearer to end of snout than to eye, */2 the length of head ; 

 maxillary barbel extending to the posterior end of the adipose 

 fin. Head covered with smooth skin, the median fontanel 

 extending to base of occipital process; occipital process 

 very long and slender, 8 times as long as broad, extending 

 beneath the skin to the basal shield of the dorsal spine. 

 Clavicular process not reaching the middle of the pectoral 

 spine. Dorsal I, 7, the spine weakly serrated behind, a little 

 more than ! /2 tne length of head; anterior branched rays 3 / 4 

 the length of head. Adipose fin much longer than base of 

 anal, commencing at a distance from the dorsal, wich is equal 

 to 2 / 7 the length of its own base, which is equal to its distance 

 from the dorsal spine. Anal 11. Pectoral spine about 2 / 3 the 

 length of head, with moderately strong serrae on the inner 



