103 
formed at Port Arthur. 
Odax algensis. Od . capite longiusculo ; prwopcrculo 
denliculato ; facie utrinque sex-siriatd. 
Radii:— Br. 5—3; P. 14; D. 17 | 12; A. 2 | 12; V. 1 | 4. C. 12$. 
Another species of kelp-fish common at Port Arthur, 
and of which a specimen was sent by Mr. Lempriere, but 
too much decayed for identification, is described by that 
gentleman as being marked with a dark stripe. It is 
probably the Odax halteatus of the Histoire des Poissons 
which was discovered by Pcron. 
The author then describes a new scaroid fish which did 
not form part of Mr. Lempriere’s collection, but which 
there is reason to believe was taken either at Hobart 
Town or Sydney. It was presented to the Museum of 
Haslar by Mr. Conway, formerly medical superintendent 
of a convict ship, and since deceased. The specimen 
beinjr a mounted one, no details of internal structure can 
be given, and in so far the characters of the genus or 
sub-genus are incomplete ; but it differs from the ordi¬ 
nary Lahri in the scaliness of the vertical fins, and from 
Scarus in external aspect, the form of the fins, the small¬ 
ness of the scales, especially at the base of the caudal 
fin, and in the manner in which the lips cover and move 
with the jaws. It differs from Odax in the teeth and 
ventral fins. 
Oplegnatiius, genus novum. 
Corpus ellipticum, crassum, squamis parvis oblongis 
tectum. Mandihulce modo Scarorum dentes incor¬ 
porates gerentes. Labium superius basi profundi 
sulcatum, intermaxillas fert* tegens, et cum illis movens. 
Operculum osseum alt& sinuatum, hinc bilobatum, cum 
gena squamis parvis tectum. Dorsum monopterygium. 
Costce brancliiostegae quinque. Pinnce ventrales ponfe 
pectorales site, radiis quinque ramosis et uno aculeato 
sustentate. Radii aculeati pinnarum dorsi anique 
fortes. Fascia; squamosm inter radios articulatos 
pinnarum verticalium dccurrcntes. 
