308 Zoological Society. 



superius basi profundi sulcatum, intermaxillas fere tegens, et cum 

 illis movens. Operculum osseum alte sinuatum, hinc bilobatum, 

 cum gena squamis parvis tectum. Dorsum monopterygium. Costse 

 branchiostegae quinque. Pinna ventrales pone pectorales sitae, 

 radiis quinque ramosis et uno aculeato sustentatse. Radii aculeati 

 pinnarum dorsi anique fortes. Fascice squamosa? inter radios ar- 

 ticulatos pinnarum verticalium decurrentes. 

 Op. Conwaii, species unica cognita. 



Radii:— Br. 5-5; P. 18; V. 1 | 5; D. 12 | 12; A. 3 | 12; 

 C 15|. 



In Mr. Lempriere's collection there are three specimens of Ostra- 

 cion 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 spilogastek. Ostr. (Aracana) , ventre maculato ; la- 

 teribus dorsoque fasciis interrupts ornatis, quarum quatuor sub 

 oculo numerandis , tribus in basibus pinnarum dorsi anique et 

 tribus prope finem pinnce eaudce anastomosantibus . 

 Radii:— P. 1 1 ; D. 11 ; A. 11 ; C. 11. 



The three following species are also from Van Diemen's Land, 

 though not now characterized for the first time. 



Ostracion auritus (Shaw). Ostr. (Aracana), ventre pallenti 

 unicolore ; lateribus dorsoque lineis saturatis rectis curvisque 

 ornatis, quarum quinque sub oculo numerandis, et tribus inpropriis 

 basibus pinnarum dorsi, ani, caudceque. 

 Radii:— P, 11 ; D. 11 ; A. 11 ; C. 11. 



Ostracion flavigaster (Gray). Ostr. (Aracana), ventre pallido 

 unicolore, lateribus dorsoque lineis saturatis per cursis, quarum octo 

 sub oculo numerandis, totidemque lineis pallidis interjacentibus ; 

 in basi pinnce caudte lineis quinque pallidis et tribus in basibus 

 pinnarum dorsi caudaque. 

 Ostracion ornatus (Gray). Ostr. (Aracana), lateribus dorso- 

 que albo tessellatis ; facie ventreque lineis purpureis, fuscis, et 

 albidis numerosis, percursis ; fasciis sex obscuris in pinnd caudce, 

 sub finem anastomosantibus. 

 Monacanthus rudis. (Nob.) Grey Monacanthus. Mon. (nee pa- 

 leari extensivo, nee caudd setosd, nee corpore papilloso vel pent- 

 celligero prteditus ;) retroscaber ; colore (murino ?) immaculato ; 

 rostro mediocri ; dentibus latis in serie duplici dispositis, decern 

 superioribus sex inferioribus ; aculeo dorsali subulato, spinifero; 

 pinnd caudce rotundatd. 

 Radii:—?. 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 



