404 PROCEEDINGS OF THE ACADEMY OF [April, 



which begin anteriorly at each side of anterior emargination and extend 

 back short space from distal maxillary end. Anterior end of upper 

 jaw thin and entirely edentulous. Uniserial teeth on each palatine, 

 anteriorly nearly large as symphyseal canines, and gradually decreasing 

 in size posteriorly. No other teeth on roof of mouth. On each side 

 of mandibular symphysis a small and nearly erect canine. Just 

 behind these and well inside 1 or 2 smaller canines. A short space 

 still posterior uniserial small mandibular teeth begin on each ramus 

 along edges, nearly uniform, small, and similar to those above except 

 more erect, or even slightly leaning forward at anterior region. Man- 

 dibular teeth continue well back inside mouth. Rami of mandible 

 well elevated inside mouth posteriorly. Tongue elongately spat u late. 

 well free in front, extending forward nearly opposite tip of upper jaw, 

 and with one series of recurved teeth, similar to those on front of 

 palatines, along each upper edge, and posteriorly these series become 

 slightly approximated. At tongue base each side a knob, opposite 

 and posterior to which surface smooth and edentulous. Lips extremely 

 thin, membranous, but little developed along jaw edges. Nostrils 

 inconspicuous, 2 small pores near last third in snout length or nearly 

 opposite distal maxillary end, and close to upper profile. Interorbital 

 region depressed, concave medianly. Occipital region with even 

 convex surface. Frontal, prefrontal, supraorbital and preorbital 

 ridges prominent. Upper postorbital ridge prominent to each opercle, 

 and preopercular ridge sloping down in wide curve to mandible. Lower 

 surface of head convexly constricted. 



Gill-opening large, extending well forward or about last \ in snout 

 length, and behind well above eye. Epibranchial region \ combined 

 cerato-hypobranchial. Rakers slender, conic, single, bifid and often 

 trifid, on epibranchials about 8, or 1 or 2 more + 25 cerato-hypobran- 

 chials, also several more sometimes. Longest rakers about f longest 

 filaments, and latter about § horizontal eye. Pseudobranchise large, 

 nearly equal largest filaments. Isthmus anteriorly long thin frenum, 

 and posteriorly still narrow with convex surface. Peritoneum with 

 outer membranes bronzed, and inner lining blackish. 



Scales small, cycloid, caducous, and with conspicuous striae on 

 exposed surfaces enlarged, very distinct, extending to edges, and 

 more or less curved in approximation toward median axis. Body 

 scaly, except upper front portion of head before eyes, mandible, all 

 fins except caudal base, and narrow area below shoulder-girdle nearly 

 to ventrals. This latter as a very narrow T naked strip over which the 

 scales do not seem to pass. Scales on trunk arranged in longitudinal 

 series, those above lateral line slope down obliquely parallel with its 



