appearance, owing to the middle of each fcale on 
that part rifing up a little above the level of the reft: 
the fcales alfo along this part are rather larger than 
elfewhere: otherwife the appearance of a lateral 
line is fcarce diftind. The dorfal fin has fourteen 
rays, of which the feven hindermoft fubdivide to¬ 
wards their tips into fofter ramifications. The pec¬ 
toral fins have thirteen rays : the ventral fins feven: 
and the anal fin twelve rays, moft of which fubdivfde 
into fofter ramifications at the tip. The tail is 
ftrongly furcated, and confifts of about twenty-four 
rays, of which the external or fhorter ones are ftrong 
or fpiny ; the reft of a fimilar appearance to thofe 
of the anal fin. The three firft rays of all the fins, 
except the pedoral ones, are very ftrong, rough, and 
finely ferrated outw r ards, but more particularly thofe 
of the ventral fins. 
Th is filh, which conftitutes a new genus, belongs 
to the Linnaean divifion of Tboracici, or fuch as have 
the ventral fins fituated beneath the pedoral ones. 
From its uncommonly rough furface I have given it 
the generic name of Tracbicbtbys , and as a trivial 
name, at leaf: till we are better acquainted with its 
natural Kiftory, it may be fuffirient to diftinguifli it 
by the title of Aufiralis. Of all the old Linnaean 
genera, or thofe contained in the twelfth edition of 
the Syftema Naturae, it feems to approach the neareft 
to that of Perea. The Tracbicbtbys Aufiralis is a na¬ 
tive of the coafts of New Holland, and the fpecimen 
from which the prefent engraving w'as taken occurred 
amongft feveral other fifties preferved in fpirits in 
the colledion of Mr. White, chief Surgeon to the 
Engl i fir 
