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 processes very long, free, tubular, projecting suddenly forwards and a little upwards and outwards.