1911.] 



NATURAL SCIENCES OF PHILADELPHIA. 



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curved fang, alternately followed by short curved fang, then larger 

 fang, then (asymmetrical on left side 2) small tooth, finally still 

 smaller one. Tongue not differentiated from base of hyoid arch. 

 Mandible with rami low, well curved up in front where also tapering 

 in thickness, and extended back behind as short angular process. 

 Nostrils close before eye?. Interorbital broad, slightly convex. 

 Preopercle edge curved back convexly. Opercle small, not quite 

 large as eye. 



Gill-opening forward before eye, about midway in snout. Rakers 

 conic, strong, sharp-pointed, only on ceratobranchial, as 9 graduated 



Fig. 1. — Stomias bonapartei Fowler. Type. 



denticles, anteriorly largest, of which first a cluster of 4 graduated 

 cusps with last longest and curved back, second of 2 cusps with first 

 longer and curved forward, third of 2 cusps with second longer and 

 curved back, and third smaller, of 3 graduated cusps with last 

 longest, though all directed back. Largest rakers about size of 

 symphyseal teeth. Filaments about equal longest rakers. Pseudo- 

 branchiae absent. Isthmus long, slender, narrowly constricted. 

 Branchiostegals 17 each side, short, slender, of about uniform length, 

 except shorter or graduated down at each end of hyoid arch. 



Scales deciduous? (entirely fallen from my example), but appar- 

 37 



