3. HEMIRnAMPHITS. 267 



15. Hemirhamphus aflSnis. 

 D. 15. A. 16. 



Closely allied to H. dussumierii, but with the head narrower. 



Eody subtetrahedral. The length of the entire head is contained 

 twice and two-thirds in the total (without caudal), the length of the 

 lower jaw (beyond the extremity of the upper jaw) four times and a 

 half. The triangular part of the upper jaw, formed by the intei'max- 

 illaries, is broader than long. Eye large, its diameter being somewhat 

 more than the width of the interorbital space, and not much less than 

 the postorbital part of the head. Parietal part of the head as broad as 

 long. The root of the ventral fin is nearer to the base of the caudal 

 than to the head. Dorsal and anal fins scaleless ; the former longer 

 than the latter. Caudal fin deeply forked, the central rays being 

 about as long as the eye. Sides with a well-defined narrow silvery 

 band. 



South Sea. 



a-b. Five and a half inches long. 



16. Hemirhamplius laticeps. 

 D. 15. A. 15. 



Closely allied to H. dussumierii, but with the beak longer. 



Body subtetrahedral. The length of the entire head is contained 

 twice and a half in the total (without caudal), the length of the lower 

 jaw (beyond the extremity of the upper jaw) four times and two-thirds. 

 The triangular part of the upper jaw, formed by the intcrmaxillaries, 

 is broader than long. Eye large, its diameter being a little more 

 than the width of the interorbital space, and not much less than the 

 length of the postorbital part of the head. Parietal part of the head 

 broader than long. The root of the ventral fin is midway between 

 the axil of the pectoral and the base of the caudal. Dorsal and anal 

 fins scaleless ; the former longer than the latter. Caudal fin deeply 

 forked, the central rays being as long as the eye. Sides with a well- 

 defined narrow silvery band. 



Fecjee Islands. 



a-il. Five and a half inches long. Voyage of H.M.8. Herald. 



17. Hemirhamphus quoyi. 



Cuv. Sf- Vul. xix. p. 20; Bleek. Nat. Tydschr. Keclerl. Ind. ii. p. 491, 

 cop. in Verh, Bat. Gen. xxiv. Snoek. p. 26, and Ned. Tydschr. Dierk. 

 iii. p. 153. 



D. 16. A. 14. P. 12. L. lat. 50-55. 

 Allied to H. dussumierii. Body tetrahedral, as broad as deep. 

 The length of the head is contained from three times and a half to 

 three times and two-thirds in the total (with the caudal), that of 

 the snout five times and a half or six times, and that of the pro- 

 minent part of the lower jaw eight or eleven times. Upper jaw 

 broader than long. The diameter of the eye is contained once and 



