266 DESCRIPTIONS OF AUSTRALIAN FISHES, 



Moresby, which have been identified by Macleay as the latter 

 species. 



Family SCOMBRID^. 



Genus Grammatorycnus Gill. 



Grammatorycnus Gill, Proc. Acad. Nat. Sci. Philad., 1862, 

 p. 125 (Thynnus bilineatus Riippell). 



Nesogrammus Evermann & Scale, Bull. U. S. Fish. Bur., xxvi., 

 1907, p. 61 {N. piersoni Evermann & Seale). 



Nesogrammus is apparently identical with Grammatorycniis. 

 The former is said to have no corselet, whereas it is formed of 

 somewhat enlarged scales in the latter. In the species described 

 below, it is not very well defined, and is apparently intermediate 

 between the two extremes. 



Grammatorycnus bicarinatus Quoy & Gaimard. 

 Large-scaled Tunny. 

 (Plate XXXV., fig.l.) 

 Thynnus hicarinatus Quoy and Gaimard, Voy. " Uranie " and 

 " Physicienne," 1825, p.357, PI. Ixi., fig.l. 



D. xii., 10,7; A. ii.,6; P. 24; V. i., 5; C. 17. Head 4-8, depth 

 4-4 in the length from the tip of the snout to the pit at the base 

 of the caudal fin. Eye 5*9, snout 2*8, interorbital space 3*1, and 

 depth of caudal peduncle 5*3 in the head. Pectoral 1'6, ventral 

 2'8, second dorsal spine 3*1, and second dorsal and anal rays 2 

 in the head. 



Body rather elongate, fusiform, somewhat compressed laterally. 

 Dorsal and ventral profiles evenly curved, the greatest depth 

 being in the middle of the length. Head conical, rather flat 

 above; the jaws are pointed, and the lower is the longer. Max- 

 illary reaching to below the middle of the eye, not covered by 

 the preorbital; it is expanded posteriorly. Interorbital space 

 slightly convex. Posterior margin of preoperculum smooth, the 

 angle produced a little backwards, and broadly rounded. Oper- 

 cular margin somewhat excavate above. Eye in the upper half 

 of the head, and a little in advance of the middle of its length; 

 it is surrounded by a semitransparent lid. 



