FISHES OF THE PHILIPPINE AND ADJACENT SEAS 229 



Depth iVs to 2; head 3% to 3^5, width V/g to 2. Snout l}i to 

 ^H'> eye 3 to 4, 2 to 334 in snout; 1 to 13^ in interorbital ; teeth 12 

 to 14 in each jaw, rather large; maxihary 3 to 43^ in head; interor- 

 bital 2^ to 3, convexly elevated; opercle, preopercle flange and 

 humeral arch with few coarse, obsolete striae. Gill rakers 5 + 15, 

 short, weak, flexible points. 



Scales very small, broad, with very fine numerous circuli; with 15 

 to 27 apical denticles, which with 4 or 5 transverse series of basal 

 elements. 



D. IX, 24, 1 or 25, i, last spine Iji to IJ^ in head, first ray 13^^ to 

 1^; A. Ill, 23, I or 24, i, third spine 2}i to 2%, first ray 1% to 2; 

 caudal deeply emarginate, lunate, tips long and slender with upper 

 usually little longer, 23^^ to 2% in combined head and body; least 

 depth of caudal peduncle 2}4 to 23^ in head; pectoral 33^8 to 334 in 

 combined head and body; ventral 3}i to 334; caudal spine 3 to 3% 

 in head. 



Body largely uniform chocolate brown, some examples with pale 

 gray traces of small oblique gray lines on head and very fine longi- 

 tudinal grayish lines on body. Vertical fins usually little deeper 

 chocolate brown than body, and mostly with blackish spot at bases 

 of few last dorsal and anal rays. Hind caudal edge usually very 

 narrowly whitish. Pectoral brownish, ventrals dusky. Iris brown. 



We feel that the Acanthurus lineolatus Valenciennes, based on an 

 example but 100 mm. long is this species. It is very briefly noticed 

 with the caudal points extended, the color brownish-black with very 

 fine bluish longitudinal lines and the pectoral greenish. Giinther's 

 figure is surely intended for our species, though the caudal is shown 

 as more obtuse and not deeply enough emarginated. 



5687,7675. Agojo Point, Catanduanes Island. June 10, 1909. Length 115 to 



118 mm. 

 14779, 1331. Bagacay Bay, Escarpada Island, Maranjos Group. March 13, 1909. 



Length 175 mm. Ground color bistre. Sides of head and breast with brown 



spots. Chin black, rather sharply demarcated on line continuing lower edge 



of gill opening. No slioulder blotch. Dorsal edged violet black, likely purple 



in life, fin with 8 or more brown bars, most apparent in transmitted light. 



Anal similar, purple border much broader, with few bars which obscure. 



Caudal white in fork, rather darker than body. Pectoral membrane hyaline, 



upper ray darkest. 

 16745. Baganga Bay. May 13, 1908. Length 155 mm. 

 9281. Basot Island, Pocket Bay. June 11, 1909. Length 153 mm. 

 16814. Butauanan Island. June 12, 1909. Length 160 mm. 

 14458. Cuyo Island, Cuyo. April 9, 1909. Length 100 mm. 

 7435, 10776, 10777, 14332. Dalagauem Island. April 8, 1909. Length 160 to 



168 mm. 

 14621. Doc Can Islar.d. January 7, 1910. Length 157 mm. 

 4591. Grande Island reef, Subig Bay. January 8, 1908. Length 140 mm 



Uniform black except hind caudal edge which pale blue and golden iris. 

 14435. Gubat, Sorsogon, Luzon. June 23, 1909. Lengt!: 109 mm. 

 91469—29 16 



