OF AUSTRALIA. 75 
in front to the mouth, a third similar one originates at the 
angle of the mouth and ends at the serrated part of the 
prasoperculum j the dorsal has its spines white but its mem- 
branes and prolonged filaments are black ; the other part of 
the fin is yellow, with a broad longitudinal dark blue stripe 
extending nearer to the edge than to the base ; the anal and 
ventrals similar ; the caudal and pectorals of a fine yellow. 
The second dorsal and anal have their base covered with 
long pointed scales ; the teeth are white, those of the upper 
jaw are two, one on each side j they are not solved together, 
and in front they are like two sharp laminae which are joined 
at the base, but have a triangular open space between them 
towards their edge ; length seven and a quarter inches. 
HETEROSCARUS MODESTUS. 
Same form as Filamentosus, but rather shorter. The cheeks 
covered with large, thin flat scales, difficult to distinguish one 
from the other; the upper limb of the praeoperculum is 
covered with minute irregular scales; the praaoperculum is 
striato-serrated ; the operculum is naked and covered with 
•pores in its anterior half, and has on its second portion three 
series of large scales, these are followed by a denudated and 
striated posterior part ; the body is covered with large scales, 
thirty-two on the longitudinal line and thirteen on the trans- 
verse one ; the lateral line begins behind the flat rounded 
points of the operculum, descends very gradually, and extends 
on the centre of the tail up to the insertion of the caudal ; it 
is formed of a succession of ridges adjoining one another, and 
divergent posteriorly upwards and downwards. 
The dorsal is formed of fourteen spines and ten rays ; the 
anterior part of the spinous portion is elevated, and the first 
spines have filamentary prolongations, but the longest of all, 
the second, is not quite equal to two-thirds of the height of the 
body ; the spine itself being as long as the space from the 
anterior edge of the snout to the internal edge of the 
praeoperculum. The caudal is truncated of eleven long rays 
and several short lateral ones. 
