These last two specimens are exactly similar to each other in colours,
but differ from the former two in being almost immaculate, having only a
few spots on the upper part of the back. This brings them very close to
the following species, from which they are scarcely to be distinguished,
except by their smaller eyes. It should be observed further, that the
fleshy part of the tail in these specimens has the upper and under edges
fringed with the short accessory rays of the caudal, a character which
is not so obvious in any of the others.