1910.] 



NATURAL SCIENCES OF PHILADELPHIA. 



103 



and rather long occipital keel from occipital process slightly tren- 

 chant. Caudal peduncle compressed, least depth If its length. 



Head well compressed, upper profile concave over eye, otherwise 

 convex, and lower profile steeply inclined convexly. Flattened 

 sides of head approximated below. Snout convex, so that tip of 

 upper jaw level with upper eye edge, length f its width. Eye large, 

 rather high, little longer than deep, well anterior. Mouth large, 

 greatly inclined, and lower jaw strongly protruding. Maxillary 

 extends hack opposite middle of eye. Teeth large, conic, and 

 depressible in outer series in upper jaw, which also with one enlarged 

 fang-like Canine in front, and all along inner edges band of fine teeth. 

 Lower teeth erect, firm, conic, several enlarged along sides of jaw-, 

 though between them also single row of small simple teeth. Tongue 



I so pistli us harroweri Fowler. 



long, smooth, free, rounded in front. Mandible convex over surface, 

 capable of great dilation. Nostrils together, close before and slightly 

 above upper edge of eye. Interorbital convex. Suprascapula jagged 

 and hind edge notched. Opercle with large angular membranous 

 flap behind. Hind preopercular edge with membranous edge, 

 notched finely. 



Gill-opening extends forward about opposite front nostril. Rakers 

 iv, 1+8, iv, lanceolate, 2 in eye. Filaments about long as rakers. 

 Isthmus narrowly and deeply trenchant. 



Scales small, cycloid, more or less irregularly disposed, and very 

 loosely adherent. Head scaly, about 6 rows on cheek. On trunk 

 scales smaller and with more crowded appearance on median dorsal 

 line, about bases of dorsals and caudal. Rather large scales forming 



