se of the
body. The pretty wide thin inter-operculum lays freely over the gill
membranes, and covers them when shut up. The sub-operculum is minutely
crenulated on the edge, and has a small sub-membranous tip, which
projects a little beyond the three opercular teeth. A small curved notch
marks the separation between the interoperculum and sub-operculum.

The scales extend on the crown of the head to the middle of the orbits.
The snout, lips, jaws, the place at the corner of the mouth over which
the maxillary glides and the gill membrane are scaleless. The scales of
the body are very regularly disposed, showing rhomboidal disks when in
situ, with strongly ciliated edges. The lateral line ascends at its
commencement and bends rather suddenly under the first soft dorsal ray to
run near and parallel to the ridge of the back. It terminates beneath the
sixth ray from the end of the fin, but recommences on the fourth scale
beneath, and runs in the middle height of the tail to the base of the
caudal. Two or three of the scales before its recommencement, have a
minute pit in the middle of their disks, as is not unusual with the
Glyphisodons. The first part of the lateral line forms an almost
continuous tubular ridge traced on thirty-eight scales of the second row
from the summit of the back; the posterior part traverses six or seven
scales. There are twelve or thirteen scales in a vertical row on the side
of the body.

The anus, situated a short way before the anal fin, has a very small
aperture.

There are no scales on the fin membranes. The three dorsal spines are
short, graduated, moderately stout, and pungent. The twenty-three soft
rays are all distinctly articulated, and more or less branched. The last
ray is divided to the base, and is graduated with the two preceding ones,
giving a rounded form to the posterior tip of the fin. The specimen had
the anterior part of the fin frayed a little, so that it is probable that
the soft rays are higher and less distinctly branched than the artist has
represented them to be in copying the example placed before him. The
ventrals are in a line with the tip of the gill cover and first soft
dorsal ray, and from the extreme narrowness of the pelvis are close to
each other. They are tapering, pointed, and overlap the beginning of the
anal, which, though it have fewer rays than the dorsal, is similar in
structure. The pectoral and caudal are much rounded, especially the
latter. There is a