THE SEAWEEDS 
Western Australia, from B unbury south, extending like the preceding 
around the Great Bight into South Australia (Denial Bay, Dr. G. A. 
Chambers) and into Spencer Gulf and around Encounter Bay, even to 
Portland in Victoria. 
bb. Frond pinnately divided, the branches emerging from the flat faces 
of the rachis, generally bent back near the base (retrofract), the 
ramuli terete not conspicuously compressed. 
Cystophora ret ort a (Mert.) J. Agardh. 
Pinnules several times dichotomous with rounded axils. No vesicles. 
Receptacles pod-like (siliquaeform) with distant swellings (torulose). To 
90 to 120 cm. 
Western and South Australia, Victoria, Tasmania, New Zealand (Laing). 
Cystophora retroflexa (Lab. 1806) J. Agardh (1848). 
The commonest and most variable species. Pinnules pinnately decom- 
pound with subrounded axils. Vesicles numerous, stalked, of the size of 
a pea, elliptic-obovoid then spherical, mutic. Receptacles podlike, com- 
pressed to 4 cm. long, at length somewhat torulose. Tall, to 2.4 to 2.7 
metres. 
Western and South Australia, Victoria, southern New South Wales, 
Tasmania, New Zealand. 
Cystophora siliquosa J. Agardh. 
Stem quadrate robust. Pinnules pinnately decompound. No vesicles. 
Receptacles pod-like to 4.5 cm. long. To 90 to 120 cm. 
South Australia, Victoria, Tasmania. 
Cystophora torulosa (R. Br.) J. Agardh. 
Fronds with stout branches bearing short to 2.5 cm. long, thick club- 
shaped pinnules, simple or once forked. Vesicles ellipsoid, longer than 
broad, mutic. Receptacles club-shaped, torulose, to 2.5 cm. long. Height 
not much above 30 cm., growing in shallower water. 
South Australia, Victoria, Tasmania, New Zealand. 
Cystophora hotryocystis Sonder. 
Pinnae 7 to 10 cm. long, below loaded with clustered vesicles, above beset 
with densely imbricated linear pinnules about 1 cm. long. Vesicles nearly 
spherical, stalked, mutic, about 5 mm. diameter. Receptacles thick, clavate, 
obtusely triquetrous, eonceptacles accordingly in three series, 12 mm. long. 
To 90 cm. high. 
Western and South Australia and Victoria, 
