Habitat: Off Cumberland Isles, 27 fathoms.
Colour bright brown; polypidom 2 to 3 inches high, consisting of straight pinnate fronds, pinnae or branches not opposite, nor regularly alternate, divaricate at rightangles.
5. P. brevirostris, n. sp.
Cell sub-tubular, curved; mouth expanded with two equal acute teeth on each side, and a longer narrow and slightly incurved, central one in front. Rostrum small, conical, projecting, about half the length of the cell; lateral processes small, recurved at an angle, canalicular.
Habitat: Off Cumberland Isles, 27 fathoms.
Colour dirty white. In habit, and to the naked eye, very much like the last; its growth, however, appears to be longer and less regular. The difference in the cell is very great.
6. P. ramosa, n. sp.
Cells cup-shaped, deep, rounded at bottom; margin elevated on the sides, expanding, with four teeth on each side, the first and second in front much expanded, acute, incurved at the point; a long slender incurved central tooth in front; margin entire behind. Rostrum not continued to the rachis, adnate the whole length of the cell, wide and projecting, narrowed to the point, which is tubular, opening 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.