404 
THE SEAWEEDS 
C. sedoides (R. Br.) C. Agardh. Eastern Bays, Normanville. 
C. vesciculifera Harvey. Eastern Bays. 
C. simpliciuscula C. Agardh. Encounter Bay, Kangaroo Island. 
C. cactoides (Turn.) J. Agardh. Encounter Bay, Investigator 
Strait, Eastern Bays. 
3. Family Codiaceae. — Thallus freely branched, tubular ; branches inter- 
woven to form a thallus of definite macroscopic form. 
C odium Stackhouse. 
C. Lucasii Setchell. “South and east coasts of Australia” — Lucas. 
Pennington Bay, Kangaroo Island. 
C. spongiosum Harvey. Holdfast Bay, Encounter Bay, Port 
Lincoln. 
C. pomoides J. Agardh. Holdfast Bay, Encounter Bay. 
C. mammillosum Harvey. Holdfast Bay, Encounter Bay, Investi- 
gator Strait, Eastern Bays. 
C. Mueller i Kutzing. Holdfast Bay, Encounter Bay, Investigator 
Strait, Eastern Bays. 
C. galeatum J. Agardh. Encounter Bay. 
C. fragile (Sur.) Hariot. Robe, Encounter Bay. 
XI. SIPHONOCLADIALES. 
Thallus siphonaceous when young, later becoming partitioned into a 
number of multinucleate segments. Asexual reproduction by vegetative 
multiplication, rarely zoospores; sexual by biflagellate isogametes. All 
species are marine. 
Family Valoniajceae. — All cells except the rhizoids are more or less 
similar in form. 
Bictyosphaeria Decaisne. 
Z>. sericea Harvey. Holdfast Bay, Encounter Bay, Investigator 
Strait. 
Apjohnia Harvey. 
A. laetevirens Harvey. Encounter Bay, Investigator Strait, 
Eastern Bays. 
Struvea Sonder. 
8. maerophyUa Harvey. Encounter Bay, Investigator Strait. 
S. plumosa Sonder. Port Noarlunga. 
