FLUSTRIDA, 187 
elevated ridges ; cells in the same series contiguous ; a long curved 
smooth spine by the side of every alternate cell; aperture small, trans- 
verse, oval, the lower lip prominent. Avicularia --—(?). 
Zoarium about an inch in height, brown. When viewed by trans- 
mitted light, pale brown, with the lips of the aperture dark brown. 
Motanau. On the roots of Boltenia australis 
FAMILY—FLUSTRIDZ. 
Zoarium flexible, expanded, foliaceous, erect, sometimes decumbent 
and loosely attached ; cells multiserial, quincuncial or irregular. 
Genus, FLUSTRA—Linnezus. 
Cells contiguous, on both sides of the frond. 
F. papyracea, Liiis; Busk, lc, p. 48. Cells oblong, slightly 
enlarged upwards, a short marginal spine at each upper angle ; avicu- 
laria fusiform, situated on the right or left marginal spine ; olivaceous, 
in places pinkish. 
Lyall Bay. Britain. 
Genus, CARBASEA—Busk. 
Cells continuous, on one side only of the frond. 
C. pisciformis, Ausk, Zc, p. 50. Cells (viewed behind) elon- 
gated, truncated at both .ends, contracted at the waist ; in front pyri- 
form, much expanded in the middle, contracted at the top and tapering 
downwards, slightly expanding again at the end; aperture large, occupy- 
ing most of the front of the cell; ovicells immersed, marked with 
radiating lines. 
New Zealand. Cook Strait. Tasmania. Australia. 
C. episcopalis, Ausk, c., p. 52. Cells pyriform, cylindrical or 
barrel-shaped ; back marked with transverse rugee ; aperture circular, 
superior ; ovicells lofty, keeled ; avicularia none; pale stone colour. 
Lyall Bay. Bass Strait, 45 fathoms. 
C. indivisa, Busk, Zc., p. 53. Frond semicircular, undivided, 
sub-plicated ; cells oblong, surface behind granulated; ovicells (?). 
avicularia none (Busk). 
New Zealand (Hooker). 
P. cyathiformis, Macgillivray, Trans. Phil. Inst., Victoria, 
1859, 2. 97, f- 2. Zoarium infundibuliform, with the cells on the inner 
surface, white, translucent ; cells pyriform or oval, smooth, arranged in 
radiating series ; avicularia none ; aperture lunate, not extending across 
the front of the cell. 
Lyall Bay; on Catenice//a. Australia. 
