FISHES OF THE PHILIPPINE AND ADJACENT SEAS 425 



CALLYODON DIMIDIATUS (Bleeker) 



Scarus dimidiatus Bleeker, Act. Soc. Ind. Neerl. (No. 2), vol. 6, 1857, 



p.( 5) 17. Doreh, New Guinea. 

 Pseudoscarus dimidiatus Bleeker, Atlas Ichth. Ind. Neerl., vol. 1, 1862, p. 41, 



pi. 16, fig. 1 (New Guinea). — Gunther, Journ. Mus. Godeffroy, vol. 8 



(16), 1909, p. 308 (Pelew Islands and Ponape). 

 Callyodon fumifrons Jordan and Se ale. Bull. Bur. Fisher., vol. 25, 1905 



(1906), p. 326, pi. 25. Pago Pago, Samoa. 



Depth 23^ to 2%] head 2% to 3, width 2^^ to 2)4. Snout 2^ to 

 21^; eye 6^ to 73^, 2,}i to 3 3/^ in snout, 23^ to 2 3^^ in interorbital; 

 mouth cleft 2>}/^ to 3J^ in head; hps cover %to % oi teeth; canines 

 usually absent, vary 1 or 2 above each side and 1 below each side; 

 interorbital 2^ to 2% in head. Gill rakers 17 + 27, short, feeble 

 points. 



Scales in lateral line 18 or 19 + 5 + 2; 2 scales above lateral line, 

 6 or 7 below, 6 or 7 predorsal; 3 rows of cheek scales, of w^hich lowest 

 row of 2 or 3 scales on preopercle flange. Scales with 35 to 40 basal 

 radiating striae, apical 28 to 65; circuli fine. 



D. IX, 10, I, ninth spine 33^ to 33^ in head, first branched ray 

 3 to 33/^; A. Ill, 9, i, third spme 33^ to 33^, first branched ray 2% to 

 2%; caudal 13^ to l}/^, slightly emarginate, truncate as expanded; 

 least depth of caudal peduncle 2 to 2y^; pectoral 13^ to 1%; ventral 

 V/s, to 2. 



Anterior half of body pale brown nearly to end of depressed pec- 

 toral, posteriorly all darker brown. Upper lip broadly pale brown. 

 Yellowish streak from above rictus to eye, then curved down toward 

 pectoral origin; above pale yellowish streak, broad dusky band 

 back from eye toward pectoral axil, expanding little behind and 

 bordered above by yellowish line from behind eye; front of head to 

 beginning of predorsal squamation dark brown. Edges of dorsals 

 dull olive, fins medianly and basally variegated with grayish and 

 dull greenish. Anal largely dull greenish; narrowly grayish basally. 

 Caudal and ventral dull brown. Pectoral pale greenish, with broad 

 median grayish band. 



East Indies, Melanesia, Micronesia, Samoa. Easily known by 

 the pale anterior half of the body and the yellowish arc along side 

 of head, touching lower edge of eye and reaching toward pectoral 

 fin. 



6723, 8160. Alibijaban Island, Ragay Gulf, Luzon. March 6, 1909. Length, 



213 to 228 mm. 

 11289. Alimango Bay, Burias Island. March 5, 1909. Length, 200 mm. 

 5434. Off Bohol. April 8, 1908. Length, 205 mm. Teeth white. Upper lip 



pale, extends to eye as narrow brown line. Snout and chin blue. 

 7459. Bolalo Bay, Palawan Island. December 21, 1908. Length, 272 mm. 



Viridian; front and head with bluish tones; slaty bar through eye to behind 



opercle; yellowish in green below; two orange or reddish bars on dorsal. 



32872—28 28 



