Habitat: Bass Strait, 45 fathoms.

4. S. ferox, n. sp.

Opening of cell broad oval, pointed below; three short indistinct spines
above; vibraculum large, sinus deep. An enormous anterior avicularium, as
wide as the cell. Ovicell lofty, with numerous punctures over the
surface.

Habitat: Louisiade Archipelago. Bass Strait.

Distinguished from the former species by the enormous anterior
avicularium, and the form of the opening. Another peculiarity of this
species is the curious serrated appearance of the radical tubes.

12. CANDA, Lamouroux.

Character: (B.) cells rhomboidal, sinuated on the outer side for the
lodgment of a vibraculum. No sessile avicularium on the upper and outer
angle in front. An uncertain number of flexible avicularia, arranged
along the middle of the branches, and in much less number than the cells.

This genus is at once distinguished from Scrupocellaria, to which it is
otherwise closely allied, by the absence of the sessile avicularium on
the upper and outer angle in front, and also by the circumstance, that
although there are flexible anterior avicularia, they do not correspond
in number with the cells, but seem to be disposed in a special tract
along the middle of the branch or internode. The connection of the
branches by transverse tubular fibres is not a character of either
generic or specific importance, though it is more striking in the only
species hitherto known as belonging to this genus, than in any other.
These transverse tubular fibres are, like the radical fibres in
Scrupocellaria, always inserted, not into the body of a cell, but into a
vibraculum. They are evidently of the nature of a byssus.

1. C. arachnoides, Lamouroux.

Cells biserial; opening oval, truncated above, and the upper margin
recedent, with a spine on each side, the outer the longer surface of cell
covered with transparent granulations.

Habitat: Bass Strait, 45 fathoms.

b. Internodes composed of 2 to 4 cells.

13. EMMA, Gray. Dieffenbach's New Zealand, Volume 2 page 293.

Character. (B.) Cells in pairs or triplets. Opening more or less oblique,
subtriangular, partially filled up by a granulated calcareous expansion.
A sessile avicularium (not always present) on the outer side, below the
level of the opening.

This genus appears to be a natural one, though very closely allied to
Tricellaria (Fleming). The more important points of distinction consist
in the conformation of the opening of the cell, and