OF SOUTH AUSTRALIA. 
79 
Myriodesma integrifolium Harvey. 
Caulis at base terete, winged above. Leaves distichous decompound pin- 
natifid, laciniae ribless, linear, obtuse, with entire margins. Conceptacles very 
numerous, scattered. Colour light olive-brown. Substance membranaceous. 
Western and South Australia, Victoria, Tasmania. 
Family FUCACEAE. 
Oogonia forming 2 to 8 oospores (in Australian genera 4). The family 
is most abundantly spread over the colder regions of the Northern Hemis- 
phere. It is replaced in Australia mainly by members of the Sargassaceae. 
KEY TO THE GENERA. 
a. Frond branching on all sides, terete. With 
vesicles Ilormosira 
Endlieher. 
A' iphophora 
Montagne. 
aa. Frond with branches expanded in one plane. 
Without vesicles 
