FISHES OF THE PHILIPPINE SEAS AND ADJACENT WATERS 83 



4707, D. 5113. Sombrero Island, S. 7°, W. 9.5 miles (lat. 13° 51' 30" N., long. 



120° 50' 30" E.), Luzon. January 16, 1908. Length, 238 mm. 

 7475. Tataan, Simulac Island. Februar.y 20, 1908. Length, 76 mm. 

 18916. Tictuan Island. September 8, 1909. Length, 173 mm. 

 16393. Ulugan Bay, channel near Oyster Inlet. December 28, 1908. Length, 



190 mm. 

 20690, 20692. Ulugan Bay near mouth Baheli River. December 28, 1908. 



Length, 98 to 120 mm. 

 15437. Ulugan Bay near Rita Island. December 29, 1908. Length, 133 mm. 

 5131. Usada Island, Pangaturan Group, near Jolo. March 5, 1908. Length, 



270 mm. 

 13078, 13079, 13241 to 13243. Macassar market, Celebes, Dutch East Indies. 



December 24, 1909. Length, 147 to 193 mm. 

 18264. Tomahu Island. December 11, 1909. Length, 197 mm. 

 13028, 13260. Gane Road, Gillolo Island. December 1, 1909. Length, 183 to 



230 mm. 

 U.S.N. M, No. 30672. New Guinea. Australian Museum. Length, 108 to 110 



mm. Both with dark bar across pectoral base. As Penta'pus bifasciaius Fowler. 



PsiLOPENTAPODUS, new subgenus ' 



Type. — Pentapus dux Valenciennes. 



Diagnosis. — Known by the restricted predorsal scales, these extend- 

 ing forward only so far as the eyes. Canines little developed. Preo- 

 percle edge entire and flange naked. 



PENTAPODUS DUX (Valenciennes) 



Pentapus dux Valenciennes, Compt. Rend. Acad. Sci. Paris, vol. 54, p. 1203, 

 1862 (type locality: Bourbon). — Guichenot, Notes lie Reunion, vol. 2, 

 p. 25, 1862. — Sauvage, Hist. Nat. Madagascar, Poiss., p. 184, pi. 22, figs. 

 3-3a, 1891 (type). 



Depth 2%; head S}i. Snout 2}^ in head; eye 3 (description gives 

 3K), 1%? in snout; maxillary reaches %? to eye, length 3% in head; 

 maxillary edge not denticulate (figure shows only 2 teeth anteriorly 

 and very small one above; lower jaw shown with 7 equally large 

 conic teeth); interorbital low; preopercle entire; suborbital depth 

 Yio eye; apparently no opercular spine. 



Scales 54 in lateral line (45 shown on figure to caudal base and 5 

 more on latter); 6 above, 17 below (13 on figure above anal origin); 

 10 predorsal extending forward opposite hind eye edge, cheek wdth 9 

 narrowly imbricate rows of scales, preopercle flange broadly naked; 

 4 rows of postocular scales. 



D. X, 10, third spine 3% in head, last spine 3%, fourth ray 2]i;A. Ill, 

 10, third spine 3%, first ray 2%; caudal iKo, emarginate, lobes pointed; 

 least depth of caudal peduncle 2%; pectoral 1%; ventral 1}^. 



Grayish silvery, each scale Adth dark spot forming in scale rows 

 longitudinal series. Length, 500 mm. (Sauvage.) 



Bourbon, Reunion. 



' ^iXii, bald + Pentapodus: referring to the naked forehead. 



