142 
PROCEEDINGS OF SOCIETIES. 
The coenoecium is small and delicate, very calcareous, with a beau¬ 
tiful pearly lustre. Parasitical on Fucoids. 
Fremantle District, Western Australia (Dr. Harvey). 
Subsect. 2.—Bi-Multiserialaria. 
Family 2.—Salicornariadse {Busk). 
1.—Salicornaria {Guv.). 
1.— S. tenuirostris {Busk). 
Bass’s Strait; Dr. Harvey. 
2 Nelli a {Busk). 
1. — N. oculata {Busk). 
Bass’s Strait; Dr. Harvey. 
3.— Onchopora {Busk). 
1.— 0. hirsuta {Lamx. sp. ?) 
New Zealand; abundant; Dr. Joliffe. 
Family 3.—Cellulariadse {Busk). 
1.— Cellularia {Pallas), 
cuspidata {Busk). 
Abundant; Bass’s Strait; Dr. Harvey. New Zealand; Dr. Joliffe. 
A very variable species. In one form the spine on the median cell 
at the bifurcation is absent, and in another there are two to three ori¬ 
fices in the back of the cell. 
2. —Menipea {Lamx.). 
Cells oblong, abbreviated, or elongated and attenuated downwards; 
imperforate behind with a sessile lateral avicularium (frequently ab¬ 
sent), and with one or two sessile avicularia (also frequently absent) on 
the front of the cell. Ovicell globular, immersed in the internode. 
This genus requires careful revision. It is said to be distinguished 
from Emma ( Gray) by the structure of the cell-mouth, which is sub- 
triangular in the latter genus, the opening being partially filled up by a 
tubercular calcareous plate; and by the position of the lateral avicula¬ 
rium, which in Emma is entirely below the cell aperture; while in Me¬ 
nipea it is seated, when present, on the upper and outer angle of the 
cell. 
The two new species are so completely intermediate that I believe 
I am justified in uniting the Emma) with the true Menipea) into what I 
conceive to be a most natural generic group. M. ternata {Ellis) may be 
taken as a type of the genus thus constituted. M. Fuegensis {Busk) 
approaches it closely. The avicularia are still at the upper angle of the 
