308 Zoological Society. 
superius basi profundé sulcatum, intermaxillas feré tegens, et cum 
illis movens. Operculum osseum alté sinuatum, hinc bilobatum, 
cum genaé squamis parvis tectum. Dorsum monopterygium. Coste 
branchiostegee quinque. Pinne ventrales poné pectorales site, 
radiis quinque ramosis et uno aculeato sustentate. Radii aculeati 
pinnarum dorsi anique fortes. Fascie squamose inter radios ar- 
ticulatos pinnarum verticalium decurrentes. 
Op. Conwall, species unica cognita. 
_ Radi :—Br. 5—5; P. 18; V.1[/5; D. 12]12; A. S742; 
C. 154. 
In Mr. Lempriére’s collection there are three specimens of Ostra- 
eion which the author considers as examples of the Auritus of Shaw, 
of different ages, and one which he characterizes as a new species, 
also belonging to Mr. Gray’s sub-genus Aracana. They are known 
at Port Arthur by the name of ‘ Pig-fish.” 
OsTRACION SPILOGASTER. Ostr. (Aracana), ventre maculato ; la- 
teribus. dorsoque fasciis interruptis ornatis, quarum quatuor sub 
oculo numerandis, tribus in basibus pinnarum dorsi anique et 
tribus prope finem pinne eaude anastomosantibus. 
Radi -—P. 31; D. LE; A. 11; €. 1. 
The three following species are also from Van Diemen’s Land, 
though not now characterized for the first time. 
Osrracion auritus (Shaw). Ostr. (Aracana), ventre pallenté 
unicolore ; latertbus dorsoque lineis saturatis rectis curvisque 
ornatis, quarum quinque sub oculo numerandis, et tribus in propriis 
basibus pinnarum dorsi, ani, caudeque. 
Radi -——P..11;..D.113 A. 11; C.1}. 
OsTRACION FLAVIGASTER (Gray). Ostr. (Arcana), ventre pallide 
unicolore, lateribus dorsoque lineis saturatis percursis, quarum octe 
sub oculo numerandis, totidemque lineis pallidis interjacentibus ; 
in basi pinne caud@e lineis quinque pallidis et tribus in basibus 
pinnarum dorsi caudeque. 
Ostracion ornatus (Gray). Ostr. (Aracana), lateribus dorso- 
que albo tessellatis ; facie ventreque lineis purpureis, fuscis, et 
albidis numerosis, percursis ; fascits sex obscuris in pinnd caude, 
sub finem anastomosantibus. 
Monacantuus runis. (Nob.) Grey Monacanthus. Mon. (nec pa- 
leari extensivo, nec caudd setosd, nec corpore papilloso vel pent- 
celligero preditus ;) retro-scaber ; colore (murino ?) immaculato ; 
rostro mediocri ; dentibus latis in serie duplici dispositis, decem 
superioribus sex inferioribus ; aculeo dorsali subulato, spinifero ; 
innd caude rotundatd. 
' Radi :—P. 14. D. 2 | 35; A. 34; C. 12. 
This Monacanthus known at Port Arthur (as well as the Aleuteres 
described below,) by the name of ‘‘ Leather Jacket,” attains the 
length of a foot or more, and is considered to be a good fish for the 
table, the skin being removed before it is cooked. After long ma- 
ceration in spirits it has a dull greyish-brown hue, without any 
traces of spots or other configurations of colour, and the species also 
