This specimen also differs from the one above in having the teeth in
the lower jaw not quite so numerous, and the ventrals longer,
equalling one-seventh of the entire length. The colours are on the
whole similar, but more of the yellow ground is visible above the
median line, and the descending fasciæ beneath it are not so
distinctly traced out.
Habitat, Concepcion, Chile.
This species is very closely allied to the _B. biocellatus_ of Cuvier
and Valenciennes, from the same coasts. It agrees with it in all its
essential characters, and in the general disposition of the markings. It
appears to differ, however, in having fewer teeth; in the anal reaching
hardly so far as, certainly not beyond, the dorsal, as described to be
the case in that species; in the fin-ray formula; and slightly in the
colours. The _B. biocellatus_ derives its name from two ocellated spots,
one _beneath_ the last rays of the dorsal, the other _upon_ the first
three rays of that fin. In the _B. fasciatus_ here described, there
appear to be three subocellated spots beneath the dorsal, though the
last is the most distinct, besides the one upon the fin itself. The _B.
biocellatus_ was observed by M. Gay at Valparaiso. The present species
was taken by Mr. Darwin at Concepcion. Possibly it may be a mere
variety.