246 PROCEEDINGS OF THE ACADEMY OF [Apr., 



projecting. Maxillary vertically inclined, extends back slightly 

 beyond front eye edge, and its greatest expansion a little less than 

 3 in eye. Teeth in upper jaw biserial, quincuspid, though those 

 in inner series larger and apparently continued on inner base of each 

 maxillary as a small single tooth. Mandible with uniserial quin- 

 cuspid teeth, median largest and lateral ones very small posteriorly. 

 Tongue broad, depressed, rounded and free in front. Inner buccal 

 folds broad. Mandible strong, convex over surface, and rami not 

 elevated inside mouth. Nostrils together, anterior simple pore 

 with cutaneous flap behind exposing posterior in crescent, and 

 frenum would fall about last fourth in snout length. Interorbital 

 evenly convex. Posterior infraorbital broad, covers all of cheek 

 except lower narrow strip, rather obscurely striate, and its greatest 

 width f of eye. Postorbital narrow. Hind preopercle edge nearly 

 vertical, sloping slightly forward below. Opercle deep and narrow, 

 and surface nearly smooth. A long occipital fontanel begins oppo- 

 site front pupil rim and extends up within occipital process well 

 towards its tip. 



Gill-opening forward opposite front edge of eye. Gill-rakers 

 about 9 + 12, slender, lanceolate, about f length of gill-filaments, 

 and latter If in eye. Isthmus narrowly constricted, surface convex, 

 and with slight groove in front. Branchiostegals moderate, sub- 

 equal. 



Scales mostly large and well exposed, disposed in longitudinal 

 series parallel with 1. 1., and each one with a number of radiating 

 striffi, about 8 usually exposed. Scales become a little smaller along 

 anal base, and two or three series extend over latter, at least on 

 anterior part of fin. Scales of small size over most of caudal, at 

 least its greater basal portion. Free axillary pointed ventral scaly 

 flap, its length f of fin. L. 1. complete, slightly decurved, running 

 a little low along side of caudal peduncle at first, and simple tubes 

 extend about first f over exposures of scales. 



Dorsal inserted about midway between hind edge of adipose fin 

 and snout tip, first branched ray longest, and depressed fin extends 

 If to caudal base. Adipose fin inserted much nearer depressed 

 dorsal tip than caudal base, its length about equal to eye. Caudal 

 well forked, pointed lobes 'about equal. Anal inserted opposite 

 last dorsal ray base, with slight elevated lobe in front. Pectoral 

 slender, pointed, low, reaches slightly beyond ventral origin. Ven- 

 tral inserted slightly before dorsal insertion, and depressed fin about 

 reaching to anal origin. Vent at last third in space between ventral 

 and anal origins. 



