41 



Gaslrotokeus biaculeatus Bleeker, Nat. Tijdschr. Ned. Indie XV. 1858, p. 204. 

 Gastrotokeus biaculeatus Diimeril, Hist. nat. Poissons II. 1870, p. 528. 

 Gastrotokcus biaculeatus Giinther. Cat. Urit. Mus. VIII. 1870, p. 194. 

 Gastrotokeus biaculeatus Klunzinger, Ahhandl. zool.-bot. Gesellsch. Wien XXI. 



1871, p. 653. 

 Gastrotokeus biaculeatus Day, Fishes of India 4°, 1878— 1888, p. 681. 

 Gastrotokeus biaculeatus Duncker, Spolia Zeylanica vol. VII. Prt. XXV. 1910, 



p. 25. — Mitt. a. d. naturh. Mus. Hamburg, XXXII. 1915, p. 38. 

 Sy/ignathoicies biaculeatus Mc Culloch, Check-List of the fish of New South 



Wales 1919, p. 27. 



D. 37— 50; A. 4— 6; P. 20— 23; Rings 15 — 17 -f 40— 54; sub- 

 dorsal rings I — 2 + 8 — 10. 



Shields transversally striated, wanting totally in rings of 



posterior half or third of tail and ventrally in some of the 



preceding rings. Skin often with numerous longer or shorter 



branched filaments forming 



at the chin a pair of branched 



barbels. Operculum radially 



striated without keel. Origin 



of dorsal nearly opposite to 



vent. Pale green or brown, ^ . , . . 



Pig. 19. SY/i^iiathoulcs biaculeatus (Bl.) 

 dark brown spots ventra ly u^ , r ' ^- r ,,, s^ ,,, 



t •' Head of a specimen of 151 mm. X ^ l-i- 



along the median cristaeofthe 



trunk. Length 260 mm. Females somewhat shorter than males. 



Habitat: Singapore; Sumatra; Pulu Weh I ; Nias!; Banka ; 

 Bintang!; Borneo (Balikpapan ! ; East coast!); Java; Bawean ; 

 Celebes (Minahassa!, Menado, Makassar!); Saleyer!; Island Biarul; 

 Sawan ; Island Siau ! ; Batjan!; Buru ; Manipa ! ; Ambon!; Nusa 

 Laut!; Saparua; Ceram ! ; Banda; Ternate!; Halmahera!; Wai- 

 geu ! ; Schouten Islands; Misore ; West Doffer ! ; Coram; New 

 Guinea!; Aru!; Flores!; Adonara!; Solor; Samau!; Sumba!. — 

 Red Sea, Zanzibar, Mossambique, Madagascar, Seychelles, 

 Malgassy Islands, Gulf of Manaar, British India, Andamans, 

 Ceylon, Pinang, Malayan Peninsula, Siam, Philippines, Southern 

 China, Japan, Australia, Pacific Islands to Samoa. Reaching 

 therefore from East Africa to Samoa, northwards to Riu Kiu 

 Islands, southwards to South Australia. 



Marine, living in shallow water; a bad swimmer, probably 

 attached to marine plants. 



2. Acanthognathus Duncker. 



(Duncker, Mitt. a. d. Naturhist. Museum Hamburg, 1912, p. 228). 

 Corythoichthys Kaup, Cat. Lophobranchiate Fish, 1856, p. 25 (p. p.). 



