1088 Catalogue of Malayan Fishes. [Nov. 



the pectoral fins are covered with scales, larger than the very small 

 ones of the body. Along the lower margin of the preopercle, appear 

 some rather indistinct radiating lines. The vertical diameter in front 

 of the anterior dorsal is A\ in the total length. The first spine of the 

 anterior dorsal fin is but little shorter than the second, (in the figure 

 of Russell No. CXXXVI, Scomber kanagurta, Cuv. its length is 

 ^ of the second,) the second and third are each 2\ in the length of the 

 head. Although the present fish differs from Dr. Riippell's in having 

 9 instead of 10 spines in the anterior dorsal fin, in other characters 

 both agree so perfectly that they appear to be identical. A single indi- 

 vidual was observed in August 1844, at Pinang. 



Gen. Thynnus (Willoughby , 1686J, Cuvier, 1817. 



Round the thorax a kind of corslet formed by scales larger, but less 

 smooth than those of the rest of the body ; a cartilaginous keel on 

 each side of the tail between two small crests; anterior dorsal fin 

 elongated, separated by a very short interval from the second. 

 Thynnus affinis, Cantor. 



Head above and back indigo-blue, lighter, silvery, with rose-coloured 

 reflections on the sides above the lateral line ; from the angle between 

 the points of the corslet to the tail, a number of oblique, backwards 

 and upwards directed undulating blackish bands ; sides beneath the 

 lateral line and abdomen pale silvery or satin, with rose-coloured and 

 light-blue reflections ; cheeks and opercles shining silvery with similar 

 reflections ; anterior dorsal fin greyish buff with a dark brown line 

 along the anterior margin of the six first spines, changing to a trian- 

 gular spot in front of the succeeding ones ; second dorsal, anal and 

 their spurious fins pale brownish yellow, edged and washed with black- 

 ish ; caudal yellowish buff, washed with brownish in the centre ; ven- 

 trals brownish grey ; pectorals silvery grey, blackish towards the mar- 

 gin. Iris silvery, blackish blue towards the orbit. 



D 15— 3/10— VIII, C 17f, A 3/11— VII, V 1/5, P 27, Br. VII. 



Habit. — Sea of Pinang. 



Total length : 1 foot 10 inch. 



In general outline this species resembles T. pelamys (Linne). But 

 compared with the description and figure of the latter species, (Cuv. 

 and Val. T. VIII. p. 113, PI. 214,) the present differs in colours, 

 number of fin rays and in characters to be pointed out. The length of 



