4 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



h^. Preopercle serrate. 



i\ Spinous dorsal and anal sealed like soft fins ; subopercle 



and interopercle entire Pomacentrus. 



f. Spinous dorsal and anal naked ; subopercle and inter- 

 opercle serrated Daya. 



7^^ Preopercle smooth. 



p. Gill rakers less than 40 Abudefduf. 



f. Gill rakers 70 to 80 Hemiglyphidodon. 



Genus PREMNAS Cuvier 



Premnas CwrsER, Regne Animal, vol. 2, 1817, p. 345. Type Chaetodon hiaeu- 

 leatus Bloch, monotypic. 



Oval. Head deep. Opercle rugosely striate, preopercle and sub- 

 opercle denticulate. Preorbital ends in long, strong spine, directed 

 backward. Branchiostegals, 5 or 6. Scales, 70 in median lateral 

 series. Axillary ventral scale not developed. Dorsal with 10 spines, 

 rarely 9 ; rays, 16 to 19. Anal with 2 spines and 14 to 16 rays. Cau- 

 dal and paired fins rounded. 



Indian Ocean and East Indian region. 



PREMNAS BIACULEATUS (Bloch) 



Ohaetodon biaculeatus Bloch, Naturg. Ausl. Fisch., vol. 4. 1790, p. 11, pi. 

 219, fig. 2. East Indies. 



Holacanthus biaculeatus Lacep^de, Hist Nat. Poiss., vol. 4, 1803, p. 535 

 (East Indies). 



Premnas hiaculeatns GUkther, Cat. Fish. Brit. Mus.. vol. 4. 1862, p. 10 

 (Philippines). — De Crespiqny, Proc. Zool. Soc. London, 1869, p. 248 (com- 

 mensal with Actinia crasiecornis) . — Day, Fishes of India, pt. 3. 1877, p. 

 380, pi. 8a, fig. 5 (Malay Archipelago). — Bleeker, Atlas Ich. Ind. Neerl., 

 vol. 9, 1877, pi. 402 (3), figs. 7 and 9; Verb. Holl. Maatsch. Harlem, 

 (No. 6), ser. 3, vol. 2, 1877, p. 17 (Sumatra, Batu, Nias, Duizend Islands, 

 Java, Bawean, Borneo, Celebes, Solor. Timor, Halmaheira. Batjan, 

 Amboina, Ceram, Goram, Banda, Waigiu. Philippines. New Guinea). — 

 Meyer, An. Soc. Hist. Nat. Madrid, vol. 14, 1885, p. 33 ( Mysore ) .—Day, 

 Fauna British India, vol. 2, 1889, p. 378, fig. 126.— Elera, Cat. Fauna 

 Filip., vol. 1, 1895, p. 543 (Luzon, Cavite, Santa Cruz). — (Regan) Bedot, 

 Rev. Suisse Zool., vol. 17, 1909, p. 169 (Amboina). — Weber, Abbandl. 

 Senckenberg. Nat. Ges., vol. 34 (1), 1911, p. 7 (Kei Islands).— Weber 

 Siboga Exp., vol. 57, Fische, 1913, p. 334 (Daniar, Saleyer. Tual). 



Lutjanos trifasciatus Schneider, Syst. Ichth. Bloch, 1801, p. 568 (on 

 KoKLKEUTEu, Nov. Conim. Acad. Petropol., vol. 10, 1763, p. 346, pi. 8, fig. 5. 

 Moluccas). 



Premnas trifasciatus Cuvier, Hist. Nat. I'oiss., vol. 5. 1830, p. 405 

 (Banda).— Valenciennes, R^gne An. Cuv. 111., 1839, pi. 32, fig. 2.— 

 ScHLEGEL and MiJLLER, Nat. Ges. Nederl. Zool., vol. 2, 1839-44, p. 19, 

 pi. 6, fig. 6 (Batavia). 

 Scorpaena aculeata Lac£;p£:de, Hist. Nat. Poiss., vol. 3, 1802, pp. 258, 268. 

 No locality. 



Holooentrus sonnerat LACftpfeDE, Hist. Nat. Poiss., vol. 4, 1803, pp. 344, 

 391. Mauritius. 



