1911.] NATURAL SCIENCES OF PHILADELPHIA. 565 



either jaw in front. Palatine teeth biserial, inner series elongated, 

 larger and depressible, and outer mostly firm and erect. Otherwise 

 no teeth on mouth roof. A few minute asperities on upper pharyn- 

 geal region. Tongue triangular, free in front, with 2 rows of slightly 

 depressible backwardly directed teeth above, and continued back 

 over surface of basibranchial arch above where much smaller. 

 Mandible surface convex, rami not elevated but tapering to slight 

 fleshy symphyseal knob which projects slightly beyond snout tip. 

 Nostrils together, about last third in snout, and anterior without 

 cutaneous flap. Interorbital slightly concave. Anterosupraorbital 

 ridge well developed. Postorbital quite narrow, surface roughened. 

 Upper naked surface of head behind eyes with few striae and ridges, 

 little roughened. Preopercle ridge curving back and more convexly 

 below, where at least f of eye distant from latter. Opercle width 

 1§ its depth. 



Gill-opening extends forward about opposite hind eye edge. 

 Rakers minutely spinescent, numerous, much smaller than filaments. 

 Latter about 3 in eye. Pseudobranchise a little less than filaments. 

 Isthmus narrowly constricted, trenchant. Branchiostegals 16, 

 slender. 



Scales moderately large, cycloid, well exposed, edges entire, in 

 longitudinal series parallel with 1. 1., smaller on caudal base except 

 elongated flap at middle of each lobe basally, where elongate. Axil- 

 lary ventral flap?. L. 1. complete, straight from shoulder to caudal 

 base medianly, tubes simple, and small exposed crimped scale at 

 base of each scale in course anteriorly. Cheek scales in 4 rows. 

 Opercle, subopercle and interopercle scaly. 



Dorsal origin trifle nearer origin of adipose fin than snout tip, 

 first branched ray longest and depressible behind far as tip of last 

 branched ray at least, fin 3 to caudal base. Adipose fin inserted 

 about midway between depressed dorsal tip and caudal base, fin 

 about 5 to latter. Caudal forked nearly half its length, free pointed 

 tips nearly equal. Anal inserted about midway between dorsal 

 base centre and caudal base, third ray longest. Pectoral short, 

 inserted nearly midway between eye centre and dorsal origin, fin 

 reaches ventral origin. Latter inserted about last fourth between 

 pectoral and dorsal origins, fin 1£ to anal, outermost and innermost 

 rays simple, others branched, and membranes of all latter deeply 

 notched externally. Vent close in front of anal. 



Color in alcohol largely faded dull brownish, paler below. Back 

 with traces of fine and slightly darker mottlings made up of small 



