326 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



pungent spines. Suprascapula and coracoid usually exposed. Gill 

 membranes separate, free from isthmus. Gill rakers moderate, short, 

 stout. Branchiostegals 6. Pseudobranchiae present. Air bladder 

 divided, with front section shorter than hind section. Pyloric coeca 

 few or moderate. Vertebrae 25, of which 13 to 15 caudal. Scales 

 moderate or small, 40 to 100 in lateral series, round, adherent, 

 ctenoid, Preorbital usually partly with cycloid scales. Dorsal and 

 anal with basal scaly sheaths. Lateral line complete, reaches caudal 

 base, tubes simple and of moderate size. Dorsal divided in two parts 

 by deep notch, with 11 to 13 spines, rays 8 to 14. Anal spines 3, rays 

 7 to 12. Pectoral rays 12 to 16, fin pointed to rounded. Ventrals 

 close together, inserted well behind pectorals. 



Indo-Pacific region, some in fresh water, where they exhibit great 

 variation in color markings. All are fishes of small or moderate 

 size. 



Several names, Therapon at&t' Kent,^^ T. cavifrons Kent -'" and 

 T. maculosus Kent -^ are unidentifiable names. 



Although Ogilby and McCulloch include ^^ Datnia Cuyier ^^ as a 

 sjnionym of Terapon^ its type by the principle of tautonymy is 

 surely Coius datnia Buchanan-Hamilton, thus invalidating Bleeker's 

 designation of Datnia arg&ntea Cuvier.'^ Datnia Cuvier thus prop- 

 erly belongs with the sparoids as a synonym of Spatms Linnaeus. 



I do not accept Jordan's statement under Coius -^ that its logo- 

 type is " Coius polota Ham., as restricted by Fowler, 1905. This 

 designation of type prior to that of Jordan, 1917." In 1905 I did 

 not formally designate a genotype for Coius Buchanan-Hamilton and 

 therefore Jordan's designation of Coius cohojus Buchanan-Hamil- 

 ton =Per(7«i scandens Daldorf will hold and Coius becomes a synonym 

 of Andbas. 



ANALYSIS OF SPECIES 



a\ Lower opercular spiue greatly developed, produced beyond opercular lobe; 



spinous dorsal with large black blotch ; oblique dark bands on caudal. 



&*. Tebapon. Scales larger, 8 above lateral line ; median dark lateral band 



axial, at least on head and caudal fin. 



c*. Depth less than head length ; axial dark band straight, also second dark 



parallel straight band above, besides another below puta. 



c'. Depth slightly greater than head; dark lateral band bent little below 

 axis in median part of its course ; second and third dark bands above 



parallel or similarly curved jarbua. 



B^ EuTHERAPON. Scales smaller, 13 to 15 above lateral line; median dark 

 band from eye to caudal peduncle above and then out over supero- 

 median caudal rays ; below parallel band from pectoral axil and another 

 on back theraps. 



^ Great Barrier Reef, 1893, p. 369. Queensland. 



=« Mem. Queensland Mus.. vol. 5, 1916, p. 99. 



" Rt'gne Animal, vol. 2. ed. 2, 1829, p. 148. 



=«Arcb. Ngerland. Sci. Nat. Harlem, vol. 11, 1876. p. 267. 



=9 Genera of Fishes, pt. 2, 1919, p. 172. 



