FISH (PART IV). 



By B. L. Chaudhuri. 



This paper contains a systematic treatment of the division Perciformes of the sub-order 

 Acanthopterygii. The total number of specimens examined and recorded is 281. They 

 belong to seventeen known species, to thirteen genera and seven families. 



Sub-Order ACANTHOPTERYGII. 

 Division Perciformes. 

 Family LOBOLIDAE. 

 Genus COIUS 1 Hamilton Buchanan. 



Coius quadrifasciatus (Sevastianof). 



1809. Chaetodon quadrifasciatus, Sevastianof, Mem. Acad. Imp. Sei. St. Pétersbourg 1, p. 448, 



tab. xviii, fig. 2. 

 1822. Coius polota, Hamilton Buchanan, Fish. Ganges, pp. 95 and 370, pi. xxxviii, fig. 2. 

 1842. Anoplus polota, Temminck and Schlegel, Faun. Japon., p. 17. 

 1844. Anoplus polota, Richardson, Zool. Voy. 'Sulpher,' p. 83. 

 1849. Datina polota, Cantor, Journ. Asiat. Soc. Bengal, p. 998. 

 1851. Lobotes Jiexazona, Bleeker, Nat. Tijdschr. Ned. Ind. I, p. 9. 

 1853. Datnioides polota, id., ibid., V, p. 441. 

 1859. Datnioides polota, Günther, Cat. Fish. Brit. Mus. I, p. 339. 



1876. Datnioides quadrifasciatus, Bleeker, Arch. Néerl. Sc. Nat. XI, i, p. 272. 



1877. Datnioides quadrifasciatus, id., Atl. Ichthyol. Ind. Orient. Néerl. VIII, p. 32, pi. cccv. 



fig.l. 



1878. Datnioides poluta, Day, Fish. Ind. p. 96, pi. xxiv, fig. 6. 



1889. Datnioides quadrifasciatus, Day, Faun. Brit. Ind. Fish. I, p. 535, fig. 162. 



1890. Datnioides polota, Vinciguerra, Ann. Civ. Stor. Nat. Genova (2) IX, p. 162. 

 1905. Coius quadrifasciatus, Fowler, Proc. Acad. Nat. Sei. Philadelphia LVII, p. 504. 

 1907. Datnioides polota, Lloyd, Pec. Ind. Mus. I, p. 227. 



The original specimen of Sevastianof (not Sebastian as given by Day in the Fauna volume) 

 must have been a young one as his figure shows all the three radiating brown bands from 

 the orbit which are conspicuous in the young specimens only. The figure of Sevastianof 

 is apparently life size, measuring 55 mm. in length. Jn colouration and marking it resembles 

 most of the young specimens in the collection. 



1 Coius is one of Hamilton Buchanan's composite genera (Fish. Ganges, p. 85). As Bleeker's Datnioides is the last 

 name proposed, it gives precedence to Coius, of which Coius polota of Hamilton Buchanan is the type. 



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