CYBIUM FLAVO-BRUNNEUM. 



tinctly visible in the fresh fish, though manifest in dried specimens. Tail fur- 

 nished with a strong sharp keel on each side. The first dorsal fin commences 

 a little behind the pectoral, is low, and the rays are connected by a delicate, 

 nearly colourless membrane ; it terminates a little in front of the second, 

 and unless when elevated, is concealed in a groove which runs along the 

 centre of the back. The second dorsal fin anteriorly is rather high, the 

 second, third, and fourth rays being considerably prolonged, posteriorly it is 

 low, and scarcely rising higher than the false fins ; the posterior edge of this fin 

 has a falciform appearance. The anal is formed after the manner of the dorsal, 

 and commences a little in front of the hinder extremity of the latter. The 

 pectoral fins are rather long, narrow, and the upper and posterior extremity 

 of each ends in a point. The ventral fins are narrow and of moderate length ; 

 the caudal fin is deeply forked and the longest, the outer rays of each por- 

 tion forming a sharp point. The false fins, five above and four below, are 

 small, and the hindermost rays of each much prolonged. 



DIMENSIONS. 



Inches. Lines 

 Distance between the nose and the eye 2 3 

 from the nose to the com- 

 mencement of 1st dorsal fin 6 6 

 from the nose to the 2d dorsal fin 11 2 



Inches. Lines. 

 Distance from the nose to the anal fin . 13 6 

 Length from the nose to the extremity 



of the caudal fin 24 



The greatest depth of the body is rather more than one-sixth of the total 

 length. 



This fish is now and then caught in the seas about the Cape of Good Hope ; but none of the 

 fishermen with whom I conversed had ever known more than two specimens to have been 

 caught in the same season. 



