ZOOPHYTOLOGY. 145 
B.—Catenicelle fasciate, Wyv. T. 
8. C. Harvey, n. sp. 
Ccencecium forming loose, handsome, curling, brown tufts. Cells large, 
purely horny, vase-shaped ; expanded superiorly by moderately large lateral 
processes, usually bearing large sublateral avicularia. External membrane 
thin, loosely investing the inner, and raised into conical papille on the front 
of the cell. Inner membrane strengthened by a raised strap of chitine, 
continuous with the thickened rim of the cell-mouth, dividing immediately 
below the lower lip, and forming a ring, again uniting and passing down the 
middle of the front of its cell to its base; and by similar straps spreading, 
apparently irregularly, over the avicularian processes, aud over the back of 
the cell. Ovicell calyptriform; sessile by a broad base in the position of 
one of the avicularian processes of a cell, which it replaces. Back of ovi- 
cell furnished with a very large sessile avicularium. 
Bass’s Strait; Dr. Harvey. A single tuft. This is a 
remarkable and most distinct species. The cells are nearly 
as large as, and resemble in form, those of C. amphora. 
The cell-walls are very evidently formed of two mem- 
branes, which remain distinct. 
In dried specimens the inner and stronger coat retains its 
form, while the outer appears to invest it in loose, wrinkled 
folds, expanding into an irregular projecting frill round the 
mouth. When the coencecium is boiled, to expel the air and 
expand the tissues, the water passes freely between the two 
layers, raising the outer wall into distinct papille, and show- 
‘Ing it loosely hung round the cell. 
The true avicularian chamber is a continuation of the 
inner cell-wall, but the hollow lateral processes, whether 
cups or spines, are formed of the thin outer membrane alone. 
y.—Cuatenicelle vitiatea, Busk. 
9. C. formosa, Busk. 
10. C. elegans, Busk. 
ll. C. Dawsoni, n. sp. 
Cells rounded, gibbous ; lateral processes large, curved forwards and out- 
wards, blunt, with usually a little depression, apparently an abortive 
avicularium at the apex. Cell-mouth rather small, rounded; operculum 
fe Surface of cell irregularly dotted with minute papillae. Vitte 
road and short, sublateral near the base of the cell. Ovicell (?). 
This species does not seem to attain a large size. There 
appear to be two varieties, a broader and a narrower, but 
agreeing in all essential characters. 
The broad form occurs of a fine yellow-brown colour, and 
in great beauty on Alge from the Freemantle district, 
Western Australia (Harvey) ; and the narrower is abundant, 
of a cinereous gray, on Bailia sent from Port Fairy by James 
Dawson, Esq., of Kangatong, to whom I am indebted for 
