500 PROCEEDINGS OF THE ACADEMY OF [Sept., 



or incised portion of mandible with a series of somewhat similar 

 teeth, about 5 each side, all rather broader than upper teeth and 

 contour of cutting-edge of each tooth less triangular. A single 

 series of large and erect conic canines along maxillary edge well down 

 near its distal extremity, and at first a little closer together. Straight 

 lateral mandibular edges with a single series of conic canines each 

 side, first few slope forward, after which they all incine well back, 

 most are also well curved. In both jaws the dentition is continuous 

 anteriorly, as the premaxillary and the maxillary, and the anterior 

 and posterior mandibular elements. Lips firm, upper with several 

 short conic denticles, and lower conceals lower lateral teeth. Tongue 

 thick, fleshy, rather narrow and not free. Snout tip extends a little 

 before mandible tip. Nostrils moderate, together, and frenum about 

 last third in snout. Interorbital well convex. Fontanel narrow, 

 extends back from opposite front eye edge to occipital crest. Pre- 

 orbital rim narrow, its width about half of eye. Greatest diameter 

 of postero-infraorbital width equals eye. Postorbital width 1 T in 

 eye. Posterior edge of preopercle inclined a little behind, straight, 

 and with a distinct and rather narrow triangular corner below. 

 Opercle narrow, its width about 2| in its depth. Preopercle surface, 

 postero-infraorbital and opercle with some rather coarse and incon- 

 spicuous striae. Cutaneous opercular flap moderately broad behind. 



Gill-opening extends forward opposite middle of eye. Rakers 

 8 + 14, rather slender, weak, pointed, and longest about half of 

 filaments. Latter about 1| in eye. No pseudobranchise. Isthmus 

 rather broad. Branchiostegals strong, subequal, 4 in number. 



Scales moderately large, cycloid, well exposed, and largely of 

 uniform size. Radiating striae on scales all fine and obsolete. Edges 

 of scales all entire, convex. Scales a little small on breast and 

 anterior preventral region, also on caudal base. Along base of anal 

 anteriorly row of low scales. No axillary scaly pectoral flap, and 

 that of ventral about 5 in fin. Scales above and below 1. 1., and its 

 course in series parallel. Below this axis and posteriorly they 

 slope slightly obliquely to anal base. Fins except as mentioned 

 above, together with head, naked. L. 1. incomplete, extends but 

 little beyond dorsal origin, its short course nearly horizontal from 

 shoulder. Tubes simple, exposed until some extend over first half 

 of scale exposures. 



Dorsal origin about midway in vertical between snout tip and 

 caudal base, almost all rays elongated with slender tips so depressed 

 fin extends back to caudal base, though antero-median rays longest. 



