1917. 



NATURAL SCIENCES OF PHILADELPHIA. 



129 



surface convex, wide as long. Eye large, rounded, nearly midway in 

 head. No adipose eyelid. Maxillary greatly inclined, reaches 

 slightly beyond front pupil edge till about opposite first f in eye, its 

 lower edge minutely dentate and greatest expansion about | of eye. 

 Mouth rather small, superior. Upper jaw with slight median 

 emargination as viewed from above. Mandible well protruded, 

 rami well elevated inside mouth. Each premaxillary with a row of 

 fine, slender, small teeth, median largest, others graduated smaller 

 forward and backward. Few weak mandibular teeth. Each pala- 

 tine with lengthwise patch of minute teeth. Tongue narrow, de- 

 pressed, few asperities above posteriorly, free in front and end 

 rounded. Nostrils together, hind one slit-like, about midway in 



Fig. 1. — Ilisha harroweri sp. nov. 



snout. Interorbital constricted, but slightly elevated, depressed 

 or with rather deep concave depression extending backward. Pre- 

 orbital width slightly less than f of eye, slips over greater portion of 

 upper maxillary edge. Postero-infraorbital about f of pupil. Pre- 

 opercle ridge oblique and hind edge only slightly inclined forward. 

 Opercles and cheeks smooth, latter with few traces of obsolete striae. 



Gill-opening forward about opposite front eye edge. Rakers 

 12 -f- 24, lanceolate, about 3 in eye. Filaments about f of rakers. 

 Pseudobranchise 2^ in eye, much larger than filaments. Isthmus 

 slender, compressed, little swollen behind. Shoulder-girdle without 

 depression, though flexible fleshy keel before pectoral base. 



Scales large, cycloid, with 3 to 5 vertical striae on each, edges 

 entire, arranged in lengthwise series, largest along middle of side 

 9 



