242 scombresocidjE. 



17. Belone cantrainii. 



Tylosurus cantrainii, Cocco, Lett, in Oiorn. Sc. Lett. Sicil. xvii. p. 18, 



tab. 1. fig. 4 ; BotiaiJ. Faun. Ital. Peso. 

 Belone cantrainii, Cuv. Sj- Val. xviii. p. 418. 



D. 23. A. 24. P. 12. V. 6. 



The free portion of the tail is depressed, with a longitudinal keel 

 on each side. The length of the head is contained thrice and one- 

 third in the total (without caudal). Teeth of moderate size. Upper 

 jaw shorter than lower ; diameter of the eye two-fifths of the length 

 of the postorbital portion of the head. The length of the pectoral 

 is rather more than the distance of the opercular margin from the 

 orbit. Ventral fin nearer to the head than to the caudal. The 

 middle and hinder dorsal rays are prolonged, and form a lobe longer 

 than the anterior one ; the last extends to or beyond the root of the 

 caudal. Posterior anal rays not produced. Caudal fin forked. 



Sicily. 



b. The middle and posterior dorsal rays are short, suheqiial in length. 



18. Belone ferox. 

 D. 21. A. 26. 



The free portion of the tail is not compressed, subtrihedral, the 

 back of the tail being broad and depressed. The length of the head 

 is less than one-third of the total (without caudal) ; its upper sur- 

 face with a broad median groove, tapering behind and widening in 

 front ; superciliary region striated ; base of the intermaxillaries 

 depressed ; only the basal half of the maxillary is hidden by the 

 prseorbital. Jaws and teeth strong ; vomerine teeth none ; tongue 

 smooth. The diameter of the eye is two-thirds of the width of the 

 interorbital space, and two-sevenths of the length of the postorbital 

 portion of the head. Body compressed, its depth being less than the 

 length of the pectoral fin, which exceeds the distance of the opercular 

 margin from the orbit. Ventral fin nearly midway between the root of 

 the caudal and the front margiii of the orbit. The middle and hinder 

 dorsal and anal rays subequal in length, short, the last terminating 

 at a considerable distance from the root of the caudal. Caudal fin 

 truncate. Scales thin and rather small, adherent. 



New South Wales. 



a. Thirty-one inches long. Sydney. Purchased of Mr. Ross. 



19. Belone robusta. 



D. 19-20. A. 22. 



The free portion of the tail is compressed, much higher than 

 broad ; lateral line terminating in a very sHght keel. The length 

 of the head is somewhat more than one-third of the total (without 

 caudal) ; its upper surface striated, without median groove ; base of 

 the intermaxillaries depressed, maxillary nearly entirely hidden by 



