A COLLECTION OF FLSHES FROM SUMATRA. 507 



Nostrils adjoining, a trifle above middle of eye, and nearer its front margin than tip 

 of snout. Literorbital space broad, convexl}' elevated, and like top of head with a 

 median trenchant keel running to spinous dorsal. Anterior part of opercle with 

 vertical striae. Space just above opercle, and upper part of shoulder girdle also 

 striate. 



Gill-opening large, running forward before nostrils a short distance. Gill- 

 rakers in form of 5 blunt processes on ceratobranchial. Isthmus narrow, with a 

 median groove. Gill-filaments about equal to three-quarters of eye, and pseudo- 

 branchiae about four-fifths their length. 



Scales small, C3'cloid, irregular, and extending on base of caudal and basal 

 portion of anterior soft dorsal and anal. Small scales on upper part of head and 

 cheeks, rest of head naked. Lateral line concurrent with back at first, then run- 

 ning along side of caudal peduncle, where it forms a slight keel, to base of caudal. 



Spinous dorsal small, low, with pungent spines, third longest, and all depres- 

 sable in a groove. Insertion of spinous dorsal a little behind origin of pectoral. 

 Soft dorsal long, high, first developed ray longest, those comprising about first third 

 of fin also elongate and graduated posteriori^'. Last dorsal ray much longer than 

 those immediately preceding. Origin of soft dorsal a little nearer tip of mandible 

 than base of its last ray. Anal spine rudimentary. Anal similar to dorsal, short, 

 anterior rays elevated, and last produced. Origin of anal a little nearer origin of 

 soft dorsal than base of caudal. Caudal deeply forked, lobes pointed, and upper 

 longer. Pectoral small, pointed, much shorter than ventral, and reaching a little 

 beyond origin of soft dorsal. Ventral long, somewhat falcate, pointed, inner rays 

 strong, and with a deep cavity at base posteriorly. When depressed fin reaches 

 three-fifths of distance to origin of anal. Anus near last third of space between 

 tips of ventrals and origin of soft anal. 



Color in arrack dull brown, darker on back or upper surface, and belly or 

 lower surface more or less soiled silvery. Fins dusky-brown, especially about 

 their edges, and median portions of soft dorsal, caudal and pectoral more brownish- 

 olivaceous. Anal pale. Ventral chalky-white. Spinous dorsal dark or deeper 

 dusky than color of other fins. Peritoneum pale. 



Length 12 inches. 



Type No. 27,499, A. N. S. P. Padang. 



One example. It differs from Seriola purpurascens Schlegel,' in the fin radii, 

 longer ventral, larger eye, more convex upper profile of head, and posterior insertion 

 of anal. Schlegel' s figure shows eye nearly one-seventh of head, ventral small, 

 and origin of anal well anterior. 



{Cretata, chalked or whited.) 



68. Elagatis bipinnulatus (Quoy and Gaimard). 



69. Alepes melanoptera Swainson. 



70. Alepes glabra sp. nov. Plate XII, lower figure. 



Head.Sf; depth 2^^; D. i, VIII— L 26; A. II— L 22; P. ii, 20; V. I, 5; 

 scales 44 in curved portion of lateral line, remaining straight portion with 62 scutes ; 



' Fauna Japonica, Poiss., 1845, p. 113, plate 51. Les mers du Japon. 



