A COLLECTION OF FISHES FROM SUMATRA. 545 



head, one and three-quarters in interorbital space, and two and one-half in snout. 

 Mouth a little low, little produced, and rounded in profile. End of maxillary well 

 formed, slipping in obliquely vertical preorbital groove. Teeth uniserial, forming a 

 compressed cutting edge, and each one also with a finely crenulated margin. Tongue 

 thick, fleshy, and edges not free from mouth. Nostrils close together and also close 

 to front of eye, anterior larger, with a cutaneous rim ending in a small flap behind. 

 Interorbital space well elevated and convex. A deep groove running obliquely 

 down from front of eye. 



Gill-opening lateral, extending forward below posterior nostril. Gill-rakers 

 4 + 10, short compressed rudiments. Filaments .equal orbit, and pseudobranchios 

 about two-thirds of latter. 



Scales minute ctenoid, a little larger on middle of side. A narrow basal scaly 

 strip to each vertical fin. Bases of caudal and ventral scaly. Base and basal 

 region of .pectoral naked, though minute scales extend well out on membranes 

 between rays. A keeled spine on caudal peduncle but little less than least depth 

 of latter, and depressable in a deep groove. Lateral line rather indistinct at first, 

 nearly concurrent with, though approaching nearer dorsal profile posteriorly, and 

 continuing directly above groove of caudal peduncle till out on base of caudal. 

 Tubes small and simple. 



• Spinous dorsal inserted a little behind origin of pectoral, graduated to posterior 

 spines which are longest and more or less equal. Soft dorsal beginning nearly mid- 

 way between tip of snout and base of caudal, rays high and similar, and posterior 

 end of fin blunt. Spinous anal inserted before soft dorsal, spines graduated to third 

 which is longest, and rayed fin like soft dorsal, except that it ends in a sharper point 

 posteriorly. Caudal with median rays forming a straight posterior margin, and 

 upper and lower ones produced into moderately long sharp points. Pectoral reach- 

 ing well beyond origin of soft dorsal, and its lower margin straight. Ventral 

 inserted a little behind origin of pectoral, pointed, reaching origin of soft anal, and 

 spine reaching about five-eighths of distance. Anus close behind and nearer origin 

 of ventral than anal. 



Color in arrack chocolate-brown, with many narrow blue lines longitudinally. 

 Fins all more or less blackish or dusky-brown, pectoral paler, with a tinge of dilute 

 olivaceous. Peritoneum silvery, with brownish dots. 



Length 14 inches. 



Type No. 27,750, A. N. S. P. Padang. 



One example. This species is distinguished by the median position of the 

 mouth, which is level with the caudal spine, and the color in combination with the 

 narrow bluish longitudinal lines. 



{Tv6(t>wSri^, obscure.) 



209. Ctenodon ctenodon (Valenciennes). 



TEUTHIDID^. 



Subgenus TEUTHIS Linnasus. 



210. Teuthis javus Linnasus. 



69 JOUEN. ACAD. NAT. SCI. PHILA., VOL. XII. 



