two lateral bands on
the sides of the cell, one passing below the avicularium and above the
lateral area, and the other towards the acuminated apex of the
avicularium. It also wants the raised bands which in C. amphora pass from
the sides of the mouth to the apex of the avicularium in front. One large
specimen presents a variety worthy of note--in this the backs of all the
cells, except one here and there, exhibit (internally ?) numerous
irregular-sized leopard-like spots.

5. C. plagiostoma, n. sp.

Cells short-ovoid; avicularia very large and long, ascending from near
the bottom of the cell into an acute spinous point, and supporting a deep
cupped cavity; mouth placed obliquely; front of cell divided into five
large subtriangular fenestrae by four broad bands. Back of cell with a
broad central band and two narrower bands branching from it on each side;
surface of spaces left uncovered by the bands on the back beset with
scattered, long setose spines.

Habitat: Bass Strait, 45 fathoms.

Colour brownish white; habit stiff, branches short. This species is at
once recognisable by the peculiar oblique position of the mouth--the
enormously developed avicularium usually only on one side of the cell,
and by the sculpture of the cell--which appears as if it were swathed
with broad tapes or bands. The wide spaces left between the bands in
front clearly represent the true nature of the fenestrae of other
species. It is the only species furnished with elongated setose spines.

6. C. lorica, n. sp.

Cellaria catenulata ? Lamarck.

Cells elongated rhomboidal, truncated at each end. Fenestrae three,
large, the lowest the largest, arranged in a triangle. Mouth very large;
avicularia wide and strong; two lateral areae on each side, well
developed; surface in front with a few indistinct circular spots around
the fenestrae, and behind marked with faint longitudinal striae.

Habitat: Bass Strait, 45 fathoms.

Colour white, transparent. A fine widely branching species, in which the
catenulate aspect is more evident to the eye than in almost any other. It
is at once recognisable by the rhomboidal scutate form of the cell viewed
anteriorly, and, when the back is also viewed, the resemblance of the two
aspects to the back, and breastplates of a coat of mail, is very
striking. The structure of the lateral processes is more distinctly to be
made out in this species than in any other. Each lateral process
consists, first, of a deep c