268 SCLEUODKUMl. 



a. Type of 0. omatus : skin, 5 inches long. Tasmania. 



h. Type of 0. jiaviy aster : skin, 5 inches long. Tasmania. 



c-d. Holf-grown : skins. Tasmania. 



e. Young. Port Lincoln. From the Collection of the Zoological 



Society. 

 f-h. Half-grown and young : in bad state. 



5. Aracana lenticalaris. 



Ostracion lenticulavis, liicJiards. Proc. Zool. Soc. 1841, p. 21, and 



Trans. Zool. Soc. iii. p. lo8. 

 Acerana (Anoplocapros) gvayi, lump, Wicgm. ylrcA.,*1855, p. 221, 



Carapace much compressed, back and abdomen compressed into a 

 crest ; no spines, sometimes the centre of each scute slightly raised. 

 Eody nnifoimly coloured or with blackish spots on its upper half. 



South Australia. 

 a-h. Twelve inches long. Sydney. From Mr. Krefft's Collection. 



c. Adult: skin. South Australia. — Type of the species. 



d. Adult : skin. Australia. — Type of A. grayi. 

 e-h. Half-grown and young : skins. 



APPENDIX TO OSTEACION. 



Ostracion boops. 

 Ostraciou boops, Richards. Voij. Ereh. Sf Terr. Fish. p. 52, pi. 30. 



figs. IMl- 

 Centaurus boops, Kaup, Wicym. Arch. 18o5, p. 221. 





Nr./""- - ' ^^ 



■Jt ■.-■■- 



This fish was taken in the South Atlantic by Dr. Hooker, in a 

 tow-net. No specimen was preserved. It is evidently a young 

 Ostracion. 



