Zoological Society. 307 
Radii :-—B.6—6; P. 13; D.9|11; V.1|5;A.3 | 10; ©. 14. 
Lasrus Frucicota. Lab., squamis parvis inter oculum et preoper- 
culum in seriebus quatuor instructis ; squamis opercularibus ma- 
jusculis. 
Radi :—B. 6—6; P.13; D.9| 11; V.1|5; A. 3| 10. C. 14. 
-Lasrvus psitracutus. Lab., squamis gene in ordinibus quatuor 
preoperculo approximatis, oculoque remotiusculis ; corpore ovali; 
pinnd caude superné apiculatd. 
Radii :—B.5—5; P.13; D.9] 11; V.1[5; A.3 [ 10; C.14. 
Lasrvus tatictavius. Lab., smaragdinus, fasciis puniceis purpureo 
marginatis, binis lateralibus postice in unam coalescentibus inque 
pind caude productis ; pinnd dorsi basi viridi : in medid late 
purpured : supern® aurantiacd, purpureo guttatd, inque margine 
extremo ceruled; pinnd ani basi aurantiacd, dein primulaceo- 
flava ceruleo cinctd, exinde purpured ceruleis guttis, denique in 
margine extremo ceruled*. 
Radit :—Br.5—5; P.12; V.1]5;D.9|11;A.3 110; C.14. 
Then follows the description of a small Odar, known at Port 
Arthur by the name of “Kelp fish.” It agrees with Odaz seimifas- 
ciatus of the Histoire des Poissons in many of its details, but on a 
minute comparison with the description of that species it appears to 
be distinct. 
Opax aucensis. Od. capite longiusculo ; preoperculo denticulato ; 
facie utringue sex-striatd. 
Radu :—Br. 5—5; 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. Lempriére, but too much decayed for 
identification, is described by that gentleman as being marked with 
a dark stripe. It is probably the Odaw balteatus of the Histoire des 
Poissons which was discovered by Peron. 
The author then describes a new scaroid fish which did not form 
part of Mr. Lempriére’s collection, but which there is reason-to be- | 
lieve was taken either at Hobart own or Sydney. It was presented 
to the Museum of Haslar by Mr. Conway, formerly medical super- 
intendent of a convict ship, and since deceased. The specimen 
being a mounted one, no details of internal structure can be given, 
and in so far the characters of the genus or sub-genus are incom- 
plete ; but it differs from the ordinary Ladri in the scaliness of the 
vertical fins, and from Scarus in external aspect, the form of the fins, 
the smallness 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 Odaz in the teeth and ventral fins. 
OPLEGNATHUS, genus novum. 
Corpus ellipticum, crassum, squamis parvis oblongis tectum. Man- 
dibule modo Scarorum dentes incorporatos gerentes. Labium 
* The character of this species being rendered obscure in the abstract of 
the former paper by the omission of a word in printing, is here repeated. 
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