43. ouAx. 241 



r. Half-grown. Port Jackson. Presented by Sir J. Richardson. 

 d. Adult : skin. Port Jackson. From Mr. Gould's Collection. 

 e-f. Fine specimens. Australia. From Mr. Gould's Collection. 

 g, h. Half-grown : not good state. From the Haslar Collection. 



2. Odax frenatus. 

 D. 31. A. 13. L.lat. 42. L. transv. 3/11. 



Praeoperculum entire ; dorsal nearly even ; a dark-brown band 

 from the snout, through the eye, to the end of the operculum ; a sil- 

 very^ band below the brown one, and continued on to the tail, where 

 it is gradually lost ; a blackish spot anteriorly on the dorsal fin. 



Australia. 



a-b. Fine specimens. Freemantle. Presented by Dr. Bowerbank. 

 c. Young. Gages Road, Swan River. Presented by the Earl of Derby. 



Description. — Head and body elongate ; the height of the latter is 

 one-eighth of the total length, the length of the head is contained 

 four times and a third in it. Snout produced, conical, not twice as 

 long as the eye. Scales on the cheek in two series, the upper of which 

 advances nearly to the angle of the mouth. The gill-membranes are 

 united, and attached to the isthmus. The dorsal spines are flexible, 

 of moderate height, and pass gradually into the soft rays, the posterior 

 of which are branched ; caudal fin rather prolonged, one-sixth of the 

 total length ; pectoral rounded, a little shorter than the ventral, two- 

 fifths of the length of the head. Back reddish-olive : a straight brown 

 band, which is broader posteriorly, runs from the end of the snout, 

 through the eye, to the posterior portion of the gill-opening ; it is 

 accompanied by a silvery band which is continued on the body, pass- 

 ing through the base of the pc^ctoral, and terminating above the anal ; 

 a more or less regular series of groups of small brown spots partly 

 along the silvery band, partly without it ; pectoral, dorsal and caudal 

 fins red, the latter blackish at the point. A blackish spot between 

 the two first dorsal spines. . 



Total length 56 lines. 



3. Odax semifasciatus. 



Cuv. ^ Val. xiv. p. 299. pi. 407. 



D. ||. A. ^. L. lat. 63. L. transv. 15-20. 



Praeoperculum entire ; none of the fin-rays produced ; dorsal fin even ; 

 caudal rounded. Yellowish, with dark bands across tlie back. (Val.) 

 Indian Ocean (?). 



The specimens mentioned by Sir J. Richardson as Odax semifas- 

 ciatus are of a different species, which we have named after that ich- 

 thyologist. 



4. Odax richardsonii. 



Odax pullus, Cuv. i^ Val. xiv. pi. 408 (uot Furst.). 



D. i^. A. -5-. L. lat. 00. L. transv. 7/2(1. 



13 11-1-2 ' 



PrKoperculum finely serrated posteriorly ; none of the fiu-iays 

 TOL. iv. K 



