12G 
ICHTHYOLOGY 
Nota.— -The interruption of the lateral line is a character 
very rarely met with in the Percidce, and, I believe, only 
observed in some sorts of Ambassis— in fact, the fish I here 
describe comes very near to that genus, but I can find no trace 
of the recumbent spine of the dorsal. 
BOSTOCKIA. 
', One dorsal fin formed of two parts j the first rather short, 
and composed of eight spines ; anal with three spines ; 
tongue smooth ; teeth very numerous, small, viliform, 
forming a transverse band on the vomer, and extending back- 
wards on each side to the throat ; opercules forming backwards, 
a bifide spine ; prseoperculum with spines at its lower edge ; 
scales small ; head cavernous, without scales. 
This genus of Percidce appears nearly allied to Glaucosoma. 
BOSTOCKIA POROSA. 
The upper profile is convex and rather gibbous on the back ; 
the head is rather elongate and pointed with the snout inflated ; 
the Tower jaw is longer than the upper one ; the height of 
the body is contained four times and one-third in the total 
length, or three and a-half times in the same without the 
caudal • head less than three times in the last dimension ; eye 
as long as the snout, and contained four times and a-half in the 
length of the head ; the nostrils are very large, and the upper 
surface of the snout very uneven, covered with short ridges 
and deep pores and holes ; similar ones are seen below the 
eye and on the lower jaw; all the opercular pieces are 
covered with scales similar to those of the body ; the lower edge 
of the external limb of the praeoperculum is armed with strong 
spinous teeth directed forwards ; a bunch of smaller, but similar 
ones, at the anterior edge of the upper limb ; there are two larger 
pores on the posterior part of the prseoperculum ; between 
its two limbs and the edge of the internal one there are corres- 
ponding notches ; scales of the body small, numbering about 
forty-five on the longitudinal line, and twenty on the 
transverse one ; those on the belly very small ; the lateral line 
