532 A COLLECTION OF FISHES FROM SUMATRA. 



POMACENTRID^. 



167. Premnas epigrammata sp. nov. Plate XIX, lower figure to right. 



Head 3i; depth 2; D. X, 16; A. II, 14; P. i, 15; V. I, 5; scales 66 in a 

 lateral series below lateral line to base of caudal ; 44 porous scales in lateral line to 

 base of caudal; 10 scales in an oblique series from origin of spinous dorsal back to 

 lateral line, and 25 between latter forward to origin of anal ; width of head 1^ in 

 its length; depth of head over posterior margin of eye 1; snout 3; eye 4^; max- 

 illary 3; interorbital space 3^; first dorsal spine 2^; second anal spine 2^; least 

 depth of caudal peduncle li; caudal 1 ; pectoral 1 ; ventral 14-. 



Body ellipsoid, deep, and strongly compressed, profiles similar. Caudal pedun- 

 cle compressed, rather deep, and its length about three-fifths its least depth. 



Head deep, protruding, and its anterior profile evenly though strongly convex. 

 Upper profile from above eye to origin of spinous dorsal a little concave. Snout 

 broad, blunt, with a convex surface and profile, and upper jaw slightly projecting. 

 Eye small, high, anterior and circular. Mouth broad, short, and gape reaching 

 opposite posterior nostril. Maxillary narrow, its width about equal to pupil of eye 

 and its posterior margin reaching opposite front rim of orbit. Mandible broad, 

 rami short and even with upper jaw in front. Teeth compressed, uniserial and 

 with their extremities more or less truncate. Vomer and palatines edentulous. 

 Tongue far back, broad, rather blunt and little free in front. Nostrils near 

 together, small, circular, posterior nearer anterior than front of eye. Interorbital 

 space broad, and a little convex or not much elevated. Bony orbital rim narrow, 

 corrugated, or roughly striated, preorbital with a short spine directed downward, 

 and infraorbital ending in a backwardly directed spine that reaches about middle of 

 opercle. Margin of preopercle with a number of rough jagged denticles. Opercle 

 finely striate. Subopercle coarsely striate and with its mai'gin denticulate. 



Gill-opening extending forward about opposite posterior margin of pupil, and 

 membrane forming a rather narrow free fold across. Gill-rakers 6 + 13, short, 

 pointed, rather weak, and equal to about two-thirds of longest filaments. Gill- 

 filaments about five-sixths of orbit. Pseudobranchise well developed, a little over 

 half of orbit. Isthmus compressed, narrow and with a shallow groove in front. 



Scales mostly finely ctenoid and small. Head more or less naked, cheek, inter- 

 opercle, and upper moiety of pectoral covered with small scales. A broad naked 

 space on each side of head above between eyes and interorbital space, and occiput. 

 Bases of vertical fins covered with minute scales. Bases of pectoral and ventral 

 with minute scales, and space between bases of ventrals thickly scaled. Lateral 

 line well curved up, ending about opposite last two-thirds of base of soft dorsal. 

 Tubes simple. 



Spinous dorsal inserted a little before origin of pectoral, fourth spine longest, 

 others graduated from it, and first and sixth of about even length. Soft dorsal 

 inserted a little before tip of pectoral, posterior rays highest, much higher than 

 posterior dorsal spines, and forming a blunt lobe. Anal inserted about opposite 

 origin of soft dorsal, first spine short, and rays of soft fin more or less equal in 



