274 PROCEEDINGS OF THE ACADEMY OP 



TRICHIDION (Klein.) 



Trichidion Klein, Historic Piscium Naturalis promovendse missus quintus, p. 

 28, 1749. 



Polynemus sp. Gronovius, Linn., auct. 



Polydactylus Lacepede, Histoire Naturelle. 



Tringa sp. Forster. 



Polynemus Giinther, Catalogue of the Acanthopterygian Fishes, &c, vol. ii. 

 p. 319. 



Trichidion Gill, Catalogue of the Fishes of the Eastern Coast of North Ame- 

 rica, p. 40. 

 Dentes velutini maxillis duobus et ossibus vomerino, palatinis et pterygoideis. 



Filamenta pectoralia 3 8. 



Body oblong, covered by scales of moderate size. Head oblong, and with a 

 protuberant snout. Preoperculum serrated. Both jaws, the vomer, and the 

 palatine and pterygoid bones armed with villiform teeth. First dorsal fin 

 placed above the ventral fins, and sustained by seven or eight spines. Second 

 dorsal and anal fins oblong, opposite and nearly equal. Pectoral filaments in 

 moderate number, varying from three to eight in the known species. 



Type. Trichidion Plumieri. 



Trichidion includes all the species described by Cuvier and Valenciennes 

 under the name of Polynemus, with the exceptions of their Polynemus dekadac- 

 tylus and P. enneadactylus. Those fishes belong apparently to the same species, 

 and have been united by Dr. Giinther under the name of Galeoides polydac- 

 tylus. The following is a list of the speeies described. 



Species with eight pectoral filaments. 



Trichidion octonemus. 



Polynemus octonemus Girard, Proceedings of the Academy of Natural Sci- 

 ences of Phila., 1858, p. 167. 

 Habitat. Texas. 



Trichidion octofilis. 



Habitat. Atlantic coast of North America. 



Species with seven pectoral filaments. 



Trichidion paradisecs. 

 Polynemus paradiseus Linn., Systema Naturse, vol. i. p. 401 . 

 Polynemus Gronovius, Zoophylacium ? sp. 398. 

 Polynemus risua Hamilton, (Buchanan), account of the Fishes of the Ganges? 



p. 228. 

 Polynemus toposui Hamilton, (Buchanan), op. cit., p. 232 ? 

 Polynemus aureus Hamilton, (Buchanan), op. cit., p. 232. 

 Polynemus longifilis Cuv. et Vol., Hist. Nat. des poissons, torn. iii. p. 365. 



torn. vii. p. 512. 

 Habitat. East Indian seas and the mouths of rivers. 



Trichidion dubuts. 



Polynemus dubius BleeJcer, Enumeratio Piscium hucusque in Archipelago 



Indico observatorum, p. 39. 

 Habitat. Sumatra and Borneo. 



Trichidion macronemus. 



Polynemus macronema Bleeker, Natuurkundij Tijdschrift voor Nederlandsch 



Indie, iii. i>. 419, 1852. 

 Polynemus Borneensis Bleaker, Enumeratio Piscium hucusque in Archi- 

 pelago Indico observatorum, &c, p. 39. 

 Habitat. Coast and rivers of Borneo. 



[Sept. 



