2. C. zelanica, Busk.
Selbia zelanica, Gray. Dieffenbach's New Zealand, volume 2 page 292.
Crisia boryi, Audouin. (Savigny Egypt plate 12 figure 4.)
Biserial; opening of cell oval or elliptical, rounded at each end, crossed in front, and thus divided into two nearly equal parts by a transverse calcareous band, from the lower edge of which depends a pedunculate, falciform operculum. Cells frequently produced upwards 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.