ening oblique, longer than the
cell; lateral processes conical, short, tubular, closely adnate. Costae
of ovarian receptacle with short opposite tubular branches; NOT connected
by a membrane.

Habitat: Swan Island, Banks Strait, thrown on the beach.

Colour greyish brown; polypidom 4 to five inches high, much branched,
branches irregular, divaricate, rising in great numbers almost
immediately from the mass of radical fibres. A beautiful species, and the
ovarian receptacles very interesting.

7. P. divaricata, n. sp.

Cells cup-shaped, long, slightly contracted at bottom; mouth circular;
margin sub-expanded, dentate, with three nearly equal upright teeth on
each side, and a long, round pointed central tooth in front. Rostrum
narrow at bottom, closely adnate, scarcely rising higher than the central
tooth; lateral processes small, closely adnate.

Habitat: Bass Strait, 45 fathoms.

Colour dark brown, almost black when dry. In habit it is extremely like
the preceding species, from which, however, it is quite distinct. The
polypidom is five or six inches high, perhaps more; stem slender,
branches long, divaricate at rightangles, not opposite.

8. P. phoenicea, n. sp.

Cells cup-shaped, rounded, bent over in front, so that the mouth is
nearly vertical; margin with two folds, subcrenate, and with a broad, but
pointed lateral lobe; entire posteriorly. Rostrum, arising solely from
the cell, small, upper half free, projecting, tubular; lateral processes
long, cylindrical, or tapering, free, projecting.

Habitat: Prince of Wales Channel, Torres Strait, in 9 fathoms.

Colour bright buff, many of the branches having a piebald aspect, or
mottled with dark purple patches; when wetted these portions present a
beautiful crimson colour. Polypidom five or six inches high, rising with
a strong, tapering, longitudinally grooved stem, which is sometimes
sparingly branched, but more commonly simple. Stem and branches pinnate
or bipinnate, the pinnae and pinnules alternate. The latter are about 1/4
inch in length.

9. P. longicornis, n. sp.

Cells urceolate, deep, upper half curved abruptly upon the lower, so that
the mouth is vertical; margin subplicate, subcrenate, rising on each side
into a broad angular lobe, entire behind, and quite free from the rachis.
Rostrum, rising entirely from the cell, with a broad base, suddenly
contracting into a long slender tube, which projects in front a long way
from the cell; lateral processe