rds into
a large arcuate ovicell. Vibracula ovoid, setae long, serrated.

Habitat: off Cumberland Islands, 27 fathoms, fine grey mud.

Slender: sufficiently distinguished by the peculiar form of the
operculum. This part is so indistinctly represented in Savigny's figures,
as to render it impossible to determine with certainty whether his
species is the present one or not. The posterior view is much more like,
but that is insufficient of itself to afford a specific character. The
back of the branches exactly resembles an ear of barley. This species
occurs in New Zealand, and also in South Africa.

b. Inoperculatae; opening of cell without an operculum.

3. C. lata, n. sp. ?

C. dichotoma ?, Lamouroux.

Branches 4 to 7 serial; opening of cells in central rows, oval, sometimes
square below; and the cell frequently produced into a shallow arcuate
cavity. A short blunt spine on each side of the mouth. Marginal cells
shallow, opening oval, margin much thickened, granulated: usually a short
conical spine at the summit; a very minute sessile avicularium behind the
outer edge, superiorly. Vibracula very large: setae serrated.

Habitat: off Cumberland Islands, 27 fathoms fine grey mud.

Colour white or yellowish; forms close rounded tufts 2 1/2 to 3 inches in
height and width, composed of uniform dichotomously divided branches,
about 1/8 of an inch wide, and which become wider towards their truncate
extremities. The vibracula are very large, and though distinctly defined,
are yet sufficiently transparent to allow a view of the lozenge-shaped
cells. The central rows of cells vary in number from two to five, and the
cells composing them are arranged with extreme regularity. The marginal
rows are placed in a plane posterior to the central, and as above
noticed, the cells of which they are composed are widely different from
the central.

The only other species with which the present can be confounded is
Caberea hookeri (Cellularia hookeri, Fleming) a British form. The latter
species appears to differ from C. lata, chiefly in its having a large
tubular spine on each side of the mouth of the lateral cells, and in each
of the central cells, or nearly so, being furnished with an anterior
avicularium, below the opening and to one side. The lateral sessile
avicularium on the marginal cells is also much larger.

Fam. 5. FLUSTRADAE.

Polyzoarium expanded, continuous or encrusting. Cells disposed in
straight series, which do not