195 



round the posterior part of the body, and joins the anal, which 

 is formed of about one hundred and twenty rays. 



The height of the body is about eighteen times in its length ; 

 the muscular flakes are very visible, and form arched lines all 

 along the body. 



The upper parts of the body are of an olive green, with the 

 belly of a blueish white ; the sides are silvery, and the head is 

 purple ; the fins are olive green, the dorsal and anal having a 

 black border. 



I believe this sort to be the Sdbenatus of Richardson, and 

 that the slight differences in the disposition of the teeth are 

 caused by age, as his specimens seem to have been older than 

 mine. 



Total length ten inches . 



Only seen once in the Melbourne Market, in the month of 

 September. Dr. Richardson's specimen was from New Zealand. 



PEGAsnm 



"Body entirely covered with bony plates, an- 

 chylosed on the trunk, and movable on the tail. 

 Barbels none. The margin of the upper jaw is 

 formed by the interniaxillaires and their cutaneous 

 prolongation, which extends downwards to the 

 extremity of the maxillaries. Gill- cover formed by 

 a large plate, homologous to the operculum, prse oper- 

 culum, and suboperculum ; interoperculum a long 

 fine bone, hidden below the gill-plate. One rudimen- 

 tary branchiostegal. The gill-plate is united with the 

 isthmus by a narrow membrane ; gill-opening 

 narrow in front of the base of the pectoral fin. 

 Gills four, lamellated. Pseudobranchise and air- 

 bladder absent ; one short dorsal and anal fin, oppo- 

 site to each other. Ventral fins present. Ovarian 

 sacs closed. Indian Ocean and Australian seas." 



