160 rERCiDJ5. 



the anal ; finally, there arc two other bands, much narrower than 



tlie anterior ones, on the tail. The fins are otherwise immaculate. 



The native sea of this species is probably a part of the Pacific. 



inches, lines. 



Total length 8 



Height of the body 2 9 



Length of the head 2 9 



Interspace between the eyes 5 



Diameter of the eye 7^ 



Length of the fourth dorsal spine 9^ 



Interspace between dorsal and caudal .... 8 



Interspace between anal and caiidal 1 



Length of the second anal spine 11 



Length of the second anal ray 13 



Height of a large scale 4 



Length of a large scale 3i 



7. Plectropoma semicinctiun. 

 Cuv. ^- Val. ix. p. 442; Gai/, Chile, Zuol. ii. p. 153, Icfiol. pi. 2. f. 1. 



Prfeopcrculum finely serrated behind, and with three equal and 

 strong spinous teeth bcluw, one of which is placed at the angle. 

 Caudahs truncated. Eed, ^vith eight brown cross-bands, lost on the 

 sides. The sides of the head with more or less distinct, irregular, 

 brownish streaks. 



San Juan Fernandez (Chih) ; Australia. 



a. Adult : skin. Australia. Purchased of jMr. WarT\-ick. 



h-d. Half-grown: sldns. AustraUa. Purchased of Mr. Warwick. 



e. Half-grown : skin. Swan River. 



f. Half-grown. Sine patria. Prom the Haslar Collection. 



8. Plectropoma susuki. 



Cur. Si Val. ii. p. 404; Faun. Japan, p. 11. pi. 4 (upper figure); 

 Eichardson, Ichthyol. China, p. 230. 



D.H A.|. 



Preeopcrculum with fine denticulations behind, coarser at the 

 angle ; a single spinous tooth below. Caudahs rounded. Brownish 

 grey, with eight or nine darker cross-bands. 



Chinese and Japanese Seas. 



9. Plectropoma dentex. 



Cuv. ^- Val. ii. p. 394; Quoy ^- Gaim. Asfrol. p. 600. pi. 4. f . 2 ; 

 Richardson, Erebus S,- Terror, p. 117. pi. 57. f. 3-5. 



J). {5. A. |. Csec. pylor. 7. 



Prxoperculum with a few inconspicuous denticulations behind, 



