496 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Gill-opening extends forward about opposite hind edge of eye. 

 Rakers none. Filaments of inner series a little longer than those in 

 outer, or about equal to f of eye-diameter. Isthmus broad. Inner 

 upper portion of gill-opening with many small papilla?. Branchi- 

 ostegals 4, strong, graduated slightly from innermost to outermost, 

 all straight and rather long. 



Scales large, of more or less even size, disposed in even longitudinal 

 series parallel with 1.1., well exposed, and each one with as many as 

 a dozen rather irregular radiating striae in some cases, usually less. 

 Margin of each scale entire, evenly convex, not rough. Scales a 

 little small on breast. Caudal base with most of scales scarcely 

 smaller than elsewhere on body, other fins naked. Head naked. 

 Pointed scaly flap in ventral axil 2\ in fin. Apparently no median 

 predorsal keel, though just traces of a faint one behind dorsal fin. 

 Though belly and chest rounded convexly, a very faint ridge or keel 

 extends from below lower pectoral base nearly to ventral axil. Post- 

 ventral and postanal regions entirely evenly convex. L. 1. complete, 

 begins at shoulder and nearly follows median axis to median caudal 

 base. Tubes simple, at first little exposed, and after ninth extending 

 at least half-way over scale exposures. 



Dorsal origin a little nearer snout tip than caudal base, fin moder- 

 ate, second branched ray longest, and when depressed reaches If to 

 adipose fin origin. Anal smaller than dorsal, margin of fin straight 

 its origin a little nearer caudal base than ventral origin, and depressed 

 fin 1^ to caudal base. Adipose fin rather large, length about equals 

 snout, its base over bases of last anal rays. Caudal rather large, 

 rays broadly expanded, fin deeply emarginated, and lower lobe a 

 little shorter. Pectoral moderate, upper rays longest and fin 

 ly to ventral origin. Latter about opposite first branched dorsal 

 ray base, second and third branched rays longest, and fin If to anal 

 origin. Vent close in front of anal. 



Color in alcohol, when fresh, largely pale slaty above, sides and 

 below silvery-white. In some lights back with an olivaceous tint, 

 in others largely grayish. Median line of back largely with dusky 

 tinge. Head dusky to olivaceous or grayish above, sides with some 

 brassy tinges, and lower surface whitish. Snout largely brownish, 

 even to edge of upper lip. Mandible pale or whitish. Iris silvery- 

 white. Dorsal slaty-dusky, deeper towards edge of fin, immaculate. 

 Caudal paler than dorsal, but large blackish blotch on caudal pedun- 

 cle side at terminal portion of lateral line continued back over median 

 rays to their tips, though paler. Inner submarginal portions of 



