546 



PROCEEDINGS OF THE ACADEMY OF 



[Oct. 



Head moderate, compressed, lower profile a little more convex 

 than upper, and nearly flattened sides only very slightly constricted 

 below. Snout short, convex over surface and in profile, length about 

 half its width. Eye large, rounded, high, centre about first f in 

 head. Pupil large. Eyelids free. Mouth broad, terminal, short 

 in commissure. Maxillary free, well inclined, extends back slightly 

 Ijeyond front eye edge, though not to that of pupil. Lips firm, 

 moderate. Teeth small, inconspicuous, conic, broad basally, biserial 

 in upper jaw, and uniserial in lower. No maxillary teeth. Upper 

 inner buccal fold broader than lower. Tongue depressed, rounded 

 and free in front. ]\Iandil)le strong, rami scarcely elevated inside 



Fig. 13. — Hyphessobnjcon hasemani Fowler. (Type.) 



mouth, and tip in front extends forward slightly before snout tip. 

 Nostrils together in posterior part of snout before eye, anterior 

 simple and posterior crescentic. Interorbital slightly convex. 

 Suborbitals well developed, and completely cover cheek, surfaces 

 smooth. Opercle with upper hind edge emarginate, deep, smooth. 

 Top of head apparently with broad fontanel as upper surface of 

 cranium soft, both in parietal and frontal region. 



Gill-opening extends forward about opposite front pupil edge. 

 Rakers about 7 + 12?, slender, lanceolate, a little smaller than 

 filaments, and latter about f in eye. Isthmus narrowly constricted, 

 convex over surface. Branchiostegals moderate, slender, subequal. 



Scales large, well exposed in lengthwise series, and of more or less 

 equal size. Except several scales on -caudal base fins scaleless, and 



