BY J. DOUGLAS OGILBY. 411 



both dor.sal fins rise gradually from the dorsal integument in 

 front but terminate in a distinct though short posterior border; 

 the outer border of the tirst dorsal tin is convex, its apical portion 

 being situated somewhat in advance of the middle of the fin, and 

 the length of its base is a little more than the interdorsal space 

 and li to I'i in the base of the second, the outer border of which 

 rises somewhat abruptly to above the origin of the median basal 

 tliird and slopes gradually downwards from thence to its junction 

 with the short posterior border, the anterior border being linear 

 or somewhat convex; its height at the apex is one-third to one-half 

 more than that of the first dorsal ; the length of the tail behind the 

 second dorsal is 1 to 1|- in the base of that fin, which is entirely 

 separated from the caudal by an interspace equal to about half 

 the length of the latter fin; the caudal lobes are equally developed 

 and are connected round the extremity of the tail by a low rayed 

 membrane. A series of open pores extends fi'om the throat 

 along the rostral canthus to the antero-superior angle of the 

 eye, where it curves downwards, and ultimately encircles three- 

 fourths of the orbital ring, from the postero-superior angle of 

 which it slopes backwards and downwards in the direction of the 

 first branchial orifice; there is a short series of similar pores above 

 and behind the postei'ior angle of the closed disk, and a few others 

 along the lower surface of the head; the lateral line is indicated 

 by a series of pores which extend along the middle of the sides 

 of the trunk, and there are similar series along each side of the 

 bases of the fins. 



Back dark slate-colour, belly and the greater portion of the 

 sides bronze, the line of demarcation well defined especially on 

 the tail; head dark gray above, silver gray on the sides and below, 

 the latter colour extending backwax"ds along the branchial region; 

 fins yellowish, broadly margined with slate-colour. 



The following is Casteluau's description of the colours in the 

 fresh example : — 



" Dark blue on the back, silvery on the sides and belly; on the 

 middle of the back, a little before the insertion of the first dorsal, 



