262 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



275 (Sandakan, Borneo). — Weber, Siboga Exp., vol. 57, Fische, 1913, 

 p. 205 (Saleyer). 

 Serranus diacanthus (part) Gunther, Cat. Fish. Brit. Mus., vol, 1, 1859, p. 

 110 (Louisiades). 



Depth 2% to 3^5 head 2% to 2)4, width 2 to 2J/£. Snout 434 to 

 4% in head from snout tip; eye 3% to 4%, subequal with snout to 

 greater in young, greater than interorbital; maxillary reaches three- 

 fourths in eye in young, beyond eye with age, expansion 1% to 1% 

 in eye, length 2 to 2% in head from snout tip; teeth in narrow bands, 

 pointed, outer row erect and one or more rows of inner depressible, 

 biserial on sides of mandible; pair of front canines in each jaw, often 

 double; small patch of fine teeth on vomer and palatines; interorbital 

 7 to 7%, little convex; preopercle edge finely denticulate, ends in 

 two strong spines below; opercular spines 3, upper anterior and obso- 

 lete. Gill rakers 7 + 13 or 14, little less than gill filaments, which 

 two-fifths of eye; upper five rudimentary. 





Figure 15.— Serranus sexfasciatus Valenciennes, young 



Scales 73 to 75 in lateral line to caudal base and 10 to 12 more on 

 latter; tubes 44 to 49 in lateral line to caudal base and 4 or 5 more 

 on latter; 16 to 18 scales above lateral line, 25 to 28 below, 44 to 48 

 predorsal, 17 to 19 rows across cheek; body scales without small basal 

 accessory scales; fins more or less minutely scaled basally; scales 

 mostly very small and smooth on head, larger on cheek and opercle, 

 lips and maxillary naked. Scales with 5 basal radiating striae; 17 to 

 25 apical denticles in 4 or 5 transverse series; circuli moderate. 



D. XI, 15, i, third spine 2Xo to 2% in total head length, seventh 

 ray 2Ko to 2^; A. Ill, 8, i, second spine 2^ to 33^, fourth ray 2 to 

 2%; caudal 1% to 1%, convex behind; least depth of caudal pedun- 

 cle 3K to 3%; pectoral \% to \y 2 ; ventral 1% to \%. 



Brown, pale or whitish on lower surface of head and abdomen. 

 Sides marked with six broad deep drown vertical bands and indistinct 

 light brown blotches scattered about and mixed with few darker ones. 



