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 0 
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. 
