CABEREID/. 15 5 
Genus, BEANIA—Johnston. 
Zoarium confervoid, sub-corneous, or calcareous; cells arising one 
from another by a slender filiform tube ; cell open in front, the edges of 
the opening furnished with hollow spinous processes arching over the 
opening ; mouth terminal, with a denticle on each side. 
B. swainsoni, Hutton, C.M.M., ~. 91. Zoarium erect, phytoid, 
dichotomously branched, sub-corneous ; cells sub-continuous, one aris- 
ing from the top of another ; coste eight to twelve. 
From the collection of the late W. Swainson. 
FAMILY—CABEREID£. 
Zoarium continuous throughout, erect, or flexible, dichotomously 
divided into ligulate bi-multiseral branches, on the backs of which are 
vibracula, or avicularia, one common to several cells ; avicularia sessile. 
Genus, CABEREA—Lamouroux. 
Back of the branches covered with large vibracula, which are 
placed obliquely in two rows, diverging in an upward direction from the 
middle line, where the vibracula of either side decussate with those of 
the other ; avicularia, when present, sessile on the front of the cell. 
C. boryi, Andouin, Busk, lc, p. 38; Selbia zealandica, Gray, 
Dieff, N.Z., i., p. 292. Cells bi-serial ; aperture oval; pedunculate 
operculum expanded principally downwards, and sometimes sending off 
a process to the opposité side of the aperture ; a single spine on the 
inner side springing from:the peduncle of the operculum ; two marginal 
spines on the outer side of the aperture ; ovicell large, arcuate ; vibra- 
cula ovoid, setze serrated. 
Lyall Bay. England. South Africa. South America. Cumber- 
land Island. 
C. lata, Busk, Zc., p. 39. Bimultiserial; marginal cells with a 
single sub-apical spine; central cells without marginal spines; sete 
serrated. 
Australia. 
Perhaps a variety of C. hookeri, Johnston, Brit. Zooph., p. 338 (Busk). 
FAMILY—BICELLARIIDA. 
Zoarium continuous, erect, dichotomously divided into narrow ligu- 
late, bi- or multiserial branches; no vibracula ; avicularia, when present, 
pedunculate and articulated. 
Genus, BICELLARIA—Fleming. 
Cells turbinate, distant ; aperture directed more or less upwards ; 
several spines, marginal or dorsal. 
