riSHES OF THE PHILIPPINE AND ADJACENT SEAS 185 



Genus HEMIGLYPHIDODON Bleeker 



Hemiglyphidodon Bleeker, Nat. Verb. Holl. Maatsch. Harlem, (No. 6), 



ser. 3, vol. 2, 1877, p. 91. Type Glyphisodon plagiometopon Bleeker, 



orthotypic. 

 Ctenoglyphidodon Fowler, Proc. Acad. Nat. Sci. Phila., 1918, p. 58. Type 



Abudefduf melanopselion FowhER = Glyphisodon plagiometopon Bleeker, 



orthotypic. 



Oblong ovate. Teeth uniserial incisors. Preorbitals and infra- 

 orbitals broadly naked, their edges entire. Preopercle edge entire. 

 Gill rakers 70 to 80 on first arch, extremely fine and elongate. Dor- 

 sal with 13 spines and 13 rays. Anal spines 2, rays 14. 



East Indian region. Although Bleeker described this genus he 

 omitted the most striking character, the greatly increased gUl-rakers. 

 It was on this that Fowler founded the later Ctenoglyphidodon. 



HEMIGLYPHIDODON PLAGIOMETOPON (Bleeker) 



Glyphisodon plagiometopon Bleeker, Nat. Tijds. Ned. Indie, vol. 3, 1852, 

 p. 67. Singapore. 



Glyphidodon plagiometopon Gunther, Cat. Fish. Brit. Mus., vol. 4, 1862, 

 p. 51 (East Indies). — Peters, Monatsb. Akad. Wiss. Berlin, 1876, p. 442 

 (Seychelles). — Bleeker, Atlas Ichth. Ind. N6erl., vol. 9, 1877, pi. 410 

 (11), fig. 4. — GoRGOZA, An. Soc. Espanola, vol. 14, 1885, p. 73 (Manila). — 

 Elera, Cat. Fauna Filip., vol. 1, 1895, p. 547 (Luzon, Manila). 



Glyphidodon {Hemiglyphidodon) plagiometopon Bleeker, Nat. Verh. Holl. 

 Maatsch. Harlem, (No. 6), ser. 3, vol. 2, 1877, p. 103 (Singapore, Java, 

 Amboina) . 



Abudefduf melanopselion Fowler, Proc. Acad. Nat. Sci. Phila., 1918, p. 59, 

 fig. 23. Philippines. — Fowler and Bean, Proc. U. S. Nat. Mus., vol. 62, 

 1922, p. 49 (Cebu). 



Depth 1% to VA; head 2^ to 3, width 1^ to 1%. Snout 2%; 

 eye 33^ to 43^, 13/8 to 1/^ in snout, l-j^ to 1}/^ in interorbital ; 

 maxillary % to or reaches eye, 33^ to 3% in head; interorbital 2J^ to 

 3^, convex. Gill rakers 30 to 35 + 38 to 48, slender, lanceolate. 



Tubes in lateral line 14 to 16, pores in straight section 5 to 8+ 1 or 

 2 ; 4 or 5 scales above lateral line to spinous dorsal origin, 9 below, 22 

 predorsal; 3 rows of cheek scales, none on infraorbital. Scales with 

 8 to 14 basal radiating striae; apical denticles 130 to 178, with 9 

 transverse series of basal elements; circuli very fine. 



D. XIII, 13, I, thirteenth spine 1 3^ to 2 in head, fifth ray lyi to 

 1%; A. II, 14, I, second spine IJ^ to 2, seventh ray 13^ to 13^; 

 caudal Ij^, broad, little emarginate; least depth of caudal peduncle 

 2yi to 23^; pectoral 13^ to l>g; ventral Ij^ to 13^. 



Dark to light brown, more or less uniform and little paler or some- 

 what yellowish in young. Pale blue line from side of snout tip to 

 eye, also blue line along lower and hind eye edge; with age these lines 

 broken into small spots or dot&; young with entire under surface of 

 head finely dotted with blue-gray, also scattered larger pale blue- 

 gray spots on cheeks and opercles, postocular and humeral regions. 

 32872—28 13 



