1915.] NATURAL SCIENCES OF PHILADELPHIA. 217 



wide contiguous bajids in jaws. No vomerine or palatine teeth. 

 Tongue broad, depressed, smooth, little free around front edges. 

 Maxillary barbels long, extend back till midway in length of hind 

 anal ray. Outer mental barbel extends back | in pectoral spine, 

 inner reaches origin of pectoral. Rictal fissure deep, extending 

 back from below hind end of maxillary to below narrow preorbital. 

 Nostrils well separated, anterior in short tubes, and posterior simple 

 pores. Interorbital depressed and flattened. Occipital process 

 extends to dorsal plate, its length If to dorsal origin, and of even 

 width most its length. Occipital fontanel slender, long, slightly 

 constricted within interorbital, and reaches occipital process. 

 Opercle broad, with rather numerous radiating striae. 



Gill-opening extends forward about last fourth in snout length. 

 Gill-rakers 2-\-Q, lanceolate, firm, about | of filaments, and latter 

 slightly more than half of eye. No pseudobranchise. Branchios- 

 tegals 6, outer rather large. 



Skin smooth. Spines smooth. Humeral process striate, its 

 length slightly more than half of pectoral spine. Dorsal and pectoral 

 spines mostly with smooth surfaces. L. 1. continuous, simple, little 

 elevated at first, midway along side. Axillary pore moderate. 



Dorsal origin about midway between snout tip and depressed 

 ventral tip, spine slender, slightly curved, front edge with 11 antrorse 

 serrae along its terminal half, hind edge entire, and depressed fin 

 not quite extending back to origin of adipose fin. Anal origin 

 nearer ventral origin than caudal base by snout length, and first 

 branched ray longest. Adipose fin moderate, its length 3| in com- 

 bined head and trunk length. Caudal well forked, lobes long, slender 

 and pointed, about equal apparently (damaged) and caudal fin 

 about equals space between snout tip and dorsal origin. Pectoral 

 extends f to ventral, spine about | length of fin, slightly curved, 

 outer edge very finely roughened basally and terminal half with 

 about ten antrorse serrae. Inner edge of pectoral spine slightly 

 roughened medianly. Ventral origin slightly behind last dorsal 

 ray base, and fin extends f to anal origin. Vent and genital aperture 

 rather near, former about first third in depressed ventral and latter 

 about last f . 



Color in alcohol pale brownish, lower surface of head and belly 

 paler or somewhat whitish. A rather narrow darker brownish 

 streak extends along side of snout to eye, and continued from hind 

 edge of latter runs along upper side of abdomen to 1. 1., which it 

 embraces below hind rays of dorsal, and then continues to caudal 



