108 
ZETTa AUSTRALIS. 
Zeus australis, JUchard., Erelus and Terror, p, 36-136 
pi. XXXV., fig. 1. 
{The John Eorey^ 
Heiglit of body two and a-balf times in total length ; head 
three times in the same ; orbit five times in the length of the 
head ; the lower jaw longer than the upper one, with the chin 
rather prominent. When the mouth is extended, the distance 
from the end of the lower jaw to the external angle of the orbit 
is Contained three and a-half times in the total length ; the 
praeoperculum forms a slight angle at about one-third of its 
length ; the operculum is prolonged in a flat, rounded angle, and 
in some specimens that part, being denudated of the skin, forms 
a strong bony point : the caudal portion of the operculum is 
covered with radiant strife ; the body is covered with very minute 
scales. The lateral line is strongly rounded to nearly two-thirds 
of the body ; it from thence follows straight to the centre of the 
base of the caudal. Along the root of the spinous dorsal there 
is at the foot of each ray a spine, short, pointed, and directed 
backwards. Along the base of the second dorsal there are gene- 
rally six, sometimes seven, plates, each bearing a strong, arched 
spine, directed posteriorly ; and on the four last there is another 
spine, placed at the base of the others, shorter, and directed 
externally. Along the soft anal there is also a series of plates, 
numbering seven or eight; all, except the first, bearing an 
extra spine, like those we have already mentioned. At the foot 
of each of the three last spines of the first anal there is a rather 
strong, single spine, and on the space between the root of the 
anal and of the ventrals there is a double series of nine spines. 
The first dorsal is formed of ten spines, the three or four first of 
which are arched, and the others straight ; the third and fourth 
are generally equal and longer than the others ; the membranes 
between the first and second is lower than the others, and emits 
a filament about as long as the first spine ; the membranes be- 
tween the others also terminate in a filament ; those between 
the second and third, and the third and fourth, are considerably 
