227 



following arches are mere knobs. Gillmembranes free from 

 isthmus, mesially nearly totally separated. 9 12 branchios- 

 tegals. A conspicuous dendritic organ between anus and anal. 

 Nomen in dig. : 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. 



Uniform brown P. canius p. 227. 



2. D. about 112. Gillrakers 26 28. Head less 



than 5, with 2 longitudinal white bands. .../*. papuensis p. 228. 



B. Anal and dorsal with less than 100 rays. (D. 90; 

 A. 82). Head 4. Uniform dark above, whitish 



beneath P. abbreviatus p. 229. 



II. Nasal barbel does not reach farther than hindborder 

 of eye. Mandibulary teeth in 2 3 rows. D. 80 100; 



A. 70 80 P. anguillaris p. 230. 



i. Plotosus canius Ham. Buch. 



Plotosus can'ms Hamilton Buchanan, Fishes Ganges 1822, p. 142. 

 Plotosus canius Cuvier & Valenciennes, Hist. Nat. Poissons XV. 1840, p. 425. 

 Plotosus unicolor Cuvier & Valenciennes, Hist. Nat. Poissons XV. 1840, p. 426. 

 Plotostis viviparus Bleekcr, Nat. en Geneesk. Arch. Ned. Ind. 111(2). 1846, p. 182. 

 Plotosiis horridus Bleeker, Nat. en Geneesk. Arch. Ned. Ind. 111(2). 1846, p. 183. 

 Plotosus multiradiatus Bleeker, Nat. en Geneesk. Arch. Ned. Ind. Ill (2). 1846, 



p. 183. 



Plotosus canius Bleeker, Atl. Ichth. II. 1862, p. 99. 

 Plotosiis canius Gunther, Cat. Brit. Mus. V. 1864, p. 25. 

 Plotosus canius Day, Fishes of India 4. 1878 1 888, p. 482. 



B. ii 13; i. D. i. 4 5; 2. D. 130 140; A. 106 118; 

 P. I. ii 12; V. 12 13; C. circa 10. 



