16 PROCEEDINGS OF THE ACADEMY OF [Jan., 



Body rather elongate, compressed, deepest near middle or origin 

 of spinous anal, and upper profile little more convex anteriorly than 

 lower. Caudal peduncle compressed, least depth If its length. 



Head rather deep, compressed, profiles similarly inclined. Snout 

 obtuse, convex over surface, protrudes little beyond lower jaw, long 

 as wide. Eye large, close to upper profile, hind pupil edge midway 

 in head length. Mouth small, with short gape horizontal about 

 half way to eye. Lips thin, narrow. Profile of mandible slightly 

 concave to articulation below, which about opposite front pupil 

 edge. Mouth protractile downward. Teeth fine, small, weak, 

 uniform, brush-like, single row in each jaw. No teeth on mouth 

 roof or tongue. Inner buccal folds rather narrow. Tongue thick 

 fleshy, not distinct. Maxillary hangs down from preorbital about 

 f eye-diameter below eye, its expansion 3 in eye. Nostrils together, 

 close before eye about level with upper pupil edge. Interorbital 

 concave. Two short sharp-pointed spines above nostrils. Supra- 

 ocular ridge finely serrated. Lower preopercle edge well serrated, 

 and serrae largest behind, hind edge entire. Supraocular spine 

 almost meets that of predorsal process. 



Gill-opening extends forward about opposite hind pupil edge. 

 Rakers 6+19, lanceolate, trifle less than filaments, which about 

 2| in eye. Pseudobranchiae little longer than gill-filaments. Shoul- 

 der-girdle edge within gill-opening with 2 firm low processes, upper 

 trifle above and lower trifle below, pectoral base. Isthmus width 

 2^ in eye, membranes broadly joined. 



Scales small, narrowly imbricated, caducous, and extend forward 

 on chest. Well-developed scaly sheaths along bases of spinous 

 dorsal and anal. Soft dorsal and anal with a series of inconspicuous 

 spines each side basally, fin ray l)etween each pair, and all directed 

 evenly backward. Axillary scaly ventral flap f length of spine. 

 Caudal base scaly. Abdomen narrowly compressed, lower face of 

 preanal spine with median groove, spine to vent or midway in space 

 between ventral and anal origins. Short median groove on process 

 of chest. Two small keels extend forward from ventral bases, 

 converge slightly in front. Lateral line convex most its course, 

 reaches caudal base, though with scale interrupted here and there 

 behind. Pores in lateral line simple, each well exposed, and form 

 nearly continuous series. 



Spinous dorsal inserted slightly behind pectoral origin, second 

 spine longest, and others graduated down behind to uniformly low 

 soft dorsal. Spinous anal inserted trifle nearer caudal base than 



