227 
following arches are mere knobs. Gillmembranes free from 
isthmus, mesially nearly totally separated. g—12 branchios- 
tegals. A conspicuous dendritic organ between anus and anal. 
Nomen indig.: Sambilang (Malay.). 
Fig. 91. Plotosus papuensis M. Web. 
Synopsis. of the species: 
I. Nasal barbel reaching farther than eye, band of man- 
dibulary teeth in 3—5 rows. 
A. Anal and dorsal with more than 100 rays. 
1. D. 130—140. Gillrakers 20. Head 5 or more. 
WnitormP browne ese ei sil tthe cholic) reine 6) alte P. canius p. 227. 
2. D. about 112. Gillrakers 26—28. Head less 
than 5, with 2 longitudinal white bands. . 4+.) 2. papuensis p. 228. 
&. Anal and dorsal with less than 100 rays. (D. 90; 
A. 82). Head 4. Uniform dark above, whitish 
IEEE 5 oO otond O60 G OG Oc B O¥eM OO cet P. abbreviatus p. 229. 
Il. Nasal barbel does not reach farther than hindborder 
of eye. Mandibulary teeth in 2—3 rows. D. 80—100; 
Lo Fi@=RWOo 6.4 60 6b bis Do Ooo OG co UO Dec P. anguillaris p. 230. 
1. Plotosus canius Ham. Buch. 
Plotosus canius Wamilton Buchanan, Fishes Ganges 1822, p. 142. 
Plotosus canius Cuvier & Valenciennes, Hist. Nat. Poissons XV. 1840, p. 425. 
Plotosus unicoloy Cuvier & Valenciennes, Hist. Nat. Poissons XV. 1840, p. 426. 
Plotosus viviparus Bleeker, Nat. en Geneesk. Arch, Ned. Ind. III (2). 1846, p. 182. 
Plotosus horridus Bleeker, Nat. en Geneesk. Arch. Ned, Ind. III (2). 1846, p. 183. 
Plotosus multiradiatus Bleeker, Nat. en Geneesk. Arch. Ned. Ind. III (2). 1846 
p-. 183. 
Plotosus canius Bleeker, Atl. Ichth. II. 1862, p. 99. 
Plotosus canius Giinther, Cat. Brit. Mus. V. 1864, p. 25. 
Plotosus canius Day, Fishes of India 4°. 1878—1888, p. 482. 
? 
B. 11—13; 1. D. 1. 4—5; 2. D. 130—140; A. 1ro6—118; 
Poi 2; Vi. p21; C. circa 10. 
