XLII-SCOMBERESOCIDZE. 



HEMIRIIAMPHUS, Cuv. 

 H, imifasciatus. 



Striped Skipper. 



Long and slender ; the length of head is contained twice 

 and three-fourths or thrice in the total, (without caudal), the 

 length of the lower jaw (oejond the extremity of the upper 

 jaw) from five times and a half to six times and a half. The 

 length of the head, without mandible, is contained thrice and 

 a third in that of the trunk, Avithout head and caudal. The 

 triangular part of the upper jaw, formed by the inlermaxil- 

 laries, is broader than long. The diameter of the eye is rather 

 less than the width of the interorbital space, and two-thirds 

 of the length of the postorbital part of the head. The root 

 of the ventral fin is nearly midway between the eye and the 

 base of the caudal. Dorsal and anal fins scaly, the former a 

 little longer than the latter. Caudal fin moderately forked, 

 the central rays being longer than the eye. Back, dark 

 greenish ; sides with a well-defined silvery band, as broad as 

 a scale. Length, 8 to 14 inches. 



Fin-rays :— D. 15-lG ; P. 13 ; V. 6 ; A. 16-17 ; C 18. 



Hemirhamphus unifasclalus, Kanzani, Nov. Comm. Acad. So. 

 Inst. Bonon. V, 1842, p. 326, tab. 25. 



^ ricitardi, Cuv. k Yal. XIX, p. 26. 



— tricuspidatn^, Gill, Proc. Acad. Nat. Se. Philad. 1859, p. 

 131. 



Not uncommon in the soutliern part of Chesapeake Bay. 



Acad. Coll. 



