336 



Nom. in dig.: Betok, Bato, Harvan, Puju (Malay), Betik 

 (Sundanese, Javanese), Pujo-Pujo (Bintang), Papuju hidju (Malay 

 at Banjermassin), Geteh-geteh (Menado), Useng, Kusa or Kusang 

 (Lake Matanna), Hoseng (Lake Towuti). 



Habitat: Singapore; Sumatra (Telokbetong, Palembang!, 

 Lahat, Muara Kompeh, Pajakombo, Padang, Priaman, Ulakan, 

 Trussan, Gunung Sahilan !, Solok!, Fort de Kock!, Singkarah!, 

 Lake Manindjau!, Upper Langkat, Djambi!, Taluk!, Ringat!, 

 Deli); Nias!; Bintang; Banka ; Java (Batavia!, Bantam, Anjer, 

 Tandjong Oost, Tjampea, Buitenzorg!, Lake Dano, Serang, 

 Tjiringin, Perdana, Tjibiliong, Pandeglang, Tjimanok, Cheribon, 

 Lake Pandjallu, Garut !, Situ-Bagendit !, Gombong, Semarang, 

 Ambarawa, Patjitan, Surakarta, Modjokerto, Surabaya, Ngawi, 

 Kediri, Lake Grati, Pasuruan) ; Bawean Island ; Borneo (Banjer- 

 massin, Prabukarta, Montrado, Pengaron, Kahajan, mouth river 

 Kapuas, Sambas, Pontianak, Sarawak) ; Madura ; Bali ; Sum- 

 bawa; Sumba; Rotti!; Timor; Celebes (Makassar!, Maros!, 

 Lake Sidenreng!, Teteadji !, Lake Posso !, Lake Matanna!, Lake 

 Towuti!, Pare-Pare !, Kema, Pompanua, Tondano, Menado); 

 Ambon; Batjan; Halmahera. -- Ceylon, British India, Burma, 

 Siam, Malakka, Tonkin, South China, Philippines. 



In lakes, rivers, ponds, marshes and ditches and estuaries. 

 Fresh and brackish water. 



Note. Although we examined a great many specimens, we 

 are still in doubt if they all belong to one species or that 

 more species must be recognized. As the result of our study 

 we can state, that among the specimens from the western part 

 of the Archipelago there occur more individuals with seventeen 

 dorsal spines and less than 28 scales in the lateral line than 

 amongst those of the eastern part. We did not find any speci- 

 mens from the indo-australian Archipelago with sixteen dorsal 

 spines. BLEEKER however records sixteen spines in A. oligolepis 

 from Borneo. In three specimens from British India (Calcutta 

 and Orissa) we find XVI, XVI, XVII, but according to DAY I.e. 

 the number of spines is XVII XVIII, so it may be that our 

 three specimens from British India have incidentally less spines. 

 DAY seems never to have met specimens with nineteen spines, 

 but these are rather frequent in the indo-australian Archi- 

 pelago, especially in material from Celebes and Rotti. 



Resuming we may say, that the relative number of speci- 



