FISHES OF THE PHHiIPPINE AND ADJACENT SEAS 287 



NASO TRIPELTES (Valenciennes) 



Naseus tripeltis Valenciennes, Hist. Nat. Poiss., vol. 10, 1831, p 276 (on 

 Vlaming, Renard, and Valenttn). — Gunther, Cat. Fish. Brit. Mus , 

 vol. 3, 1861, p. 349 (copied). 

 A doubtful nominal form, said to have the forehead with a produced 

 horizontal horn and 3 bony, carinated caudal bucklers. 



Genus PRIONURUS Lacepede 



Prionurus Lacepede, Ann. Mus. Hist. Nat. Paris, vol. 4, 1804, p. (205) 211. 



Type Prionurus microlepidotus LAcfipfeoE, monotypic. 

 Xesurus Jordan and Evermann, Rep. TJ, S, Fish Comm., pt. 21, 1895 (1896), 



p. 421. Type Prionurus punctatus Gill, orthotypicJ* 

 Acanthocaulis Waite, Rec. Australian Mus., vol. 3, 1900, p. 206. Type 



Prionurus microlepidotus LAcfipfeoE, virtually (as Acanthocaulis Waite 



proposed to replace Priomirus Lacepede). 



This genus is known by the presence of 3 to 6 caudal bucklers 

 each side. In other respects it is greatly like Naso. Besides the 

 species below several others have been described from the Eastern 

 Pacific. 



PRIONURUS MICROLEPIDOTUS Lacepfede 



Prionurus microlepidotus IiACepev^, Ann. Mus. Hist. Nat. Paris, vol. 4, 1804, 

 p. (205) 211. No locality (voyage of Peron). — Valenciennes, Hist. Nat. 

 Poiss., vol. 10, 1835, p. 295, pi. 292 (type).— GtJNTHER, Cat. Fish. Brit. 

 Mus., vol. 3, 1861, p. 347 (copied). 



Prionurus scalprum Valenciennes, Hist. Nat. Poiss., vol. 10, 1835, p. 298. 

 Japan. — Schlegel, Fauna Japon., Poiss., dec. 7-9, 1845, p. 129, pi. 70 

 (Nagasaki). — Bleeker, Verh. Batav. Genoot. (Nal. Ichth. Japan), vol. 25, 

 1853, p. 15.— GtJNTHER, Cat. Fish. Brit. Mus., vol. 3, 1861, p. 347 (Japan). 



Acanthurus scalprum (Langsdorf) Valenciennes, Hist. Nat. Poiss., vol. 10, 

 1835, p. 298 (name in synonymy). 



Xesurus scalprum Jordan and Fowler, Proc. U. S. Nat. Mus., vol. 25, 1903, 

 p. 556 (Tokyo, Misaki, Wakanoura). 



Etroplus formosus Brbvoort, Narr. Exp. Japan, Perry, vol. 2, 1856, p. 264, 

 pi. 6, fig. 1. Lew Chew (Riu Kiu). 



Depth 2; head 33^; eye 4 in head, 2% in snout, 1^ in interorbital. 

 D. IX, 22; A. Ill, 21 to 23. Dusky brown, caudal narrowly white 

 edged. 



Riu Kiu and southern Japan. 



38822 U.S.N.M. Tokyo market. Japanese Educational Museum. Length 



155 mm. 

 50756 U.S.N.M. Nagasaki, Japan. Jordan and Snyder. Length 220 to 240 mm . 



Two examples. 

 57496 U.S.N.M. Japan? P. L. Jouy. Length 200 to 230 mm. Four examples. 

 70753 U.S.N.M. Misaki, Sagami. Albatross collection, 1906. Length 32 to 56 



mm. Twenty-three examples. 



