514 A COLLECTION OF FISHES FROM SUMATRA. 



Teeth fine, small, weak, and brush-like, m jaws. Lips broad and flesh3^ Nostrils 

 close together, near front of eye a little above its middle, and anterior with a small 

 fleshy flap behind. A single preocular spine. Interorbital space a little elevated, 

 with a median ridge and a parietal ridge well separated on each side. Supra- 

 ocular ridge entire. Occipital ridge distinct. Lower edge of preopercle minutely 

 serrated. 



Gill-opening extending forward opposite front rim of pupil. About 4 -f 15 gill- 

 rakers at least, developed on first arch, short, longest much less than longest fila- 

 ments, which are about a third of eye. PseudobranchiiB large. Shoulder girdle, 

 inside gill-opening, with three processes, first opposite origin of pectoral, second just 

 below its base, and third close to second. Isthmus broad, gill-membranes broadly 

 connected. 



Scales small, narrowly imbricated, and extending on chest. Seal}? sheaths 

 along bases of spinous dorsal and anal. Soft dorsal and anal with a series of 

 inconspicuous spines on each side directed backward. Ventral flap as long as 

 spine. Base of caudal scaly. Abdomen narrowly compressed and sharply tren- 

 chant, just before anal, half way to root of ventral. A short median groove on 

 process of chest. Two small keels running forward from bases of ventrals rather 

 close together. Lateral line convex most all of its course and obliterated on upper 

 surface of caudal peduncle. Pores and scales in its course large. Back rather 

 trenchant before spinous dorsal. 



Origin of spinous dorsal about over first two-fifths of pectoral, second spine 

 highest, and others graduated down. Front edges of third and fourth dorsal, and 

 third anal spines finely serrate on basal portion. Second anal spine largest. Inser- 

 tion of spinous anal about midway between tip of snout and base of caudal. Soft 

 dorsal and anal low, similar. Caudal forked, lobes broad and pointed. Pectoral 

 small, origin but little below middle of depth of body, and reaching posteriorly 

 opposite origin of spinous anal. Ventral small, inserted a little behind origin of 

 pectoral, and reaching a trifle over halfway to origin of spinous anal. Anus nearly 

 midway between base of ventral and origin of spinous anal. 



Color in arrack pale brown on upper half of body, lower half white. Body 

 everywhere more or less silvery, and line separating dark color of back distinct. 

 Ujjper half of body marked with variable lines and blotches or vermiculations of 

 brown. Snout with a blackish-brown bar from its tip up to nostrils. Inside of 

 gill-opening dusky. Fins more or less dilute yellowish, dorsal a shade darker. 

 Axil of pectoral with brown dots. Peritoneum silvery, with brown dots. 



Length 4^ inches. 



Type No. 27,525, A. N. S. P. Padang. 



One example. This species is closely related to Equula Imeolata Valenciennes. 

 The original description of the latter is imperfect, and neither Bleeker or Dr. 

 Giinther give the scales found in a lateral count, or counted in the lateral line. 

 Day states the lateral line " consists of above 60 tubes placed in a row of plate- 

 like rounded scales." His figure does not agree with my fish, especially in the 



