OF SOUTH AUSTRALIA. 
413 
Taylor : Stilophoraceae. 
Asperococcaceae. 
Striariaceae. 
We have followed Tilden, but admit the tentative 
nature of the divisions. 
Scytosiphoxaceae Foslie 1892. 
Scytosiphon C. Agardh emend. Thuret 1850. 
S. Lomentaria (Lyngbye) J. G. Agardh. Eastern 
Bays, Holdfast Bay. 
Colpomenia Derbes & Solander 1856. 
C. sinuosa (Roth.) Derbes & Solander. Eastern 
Bays, Encounter Bay, Port Noarlunga, Hold- 
fast Bay. 
Hydroclatlirus Bory 1825. 
H . clathratus (Bory) Howe (= H. cancellatus 
Bory). Encounter Bay, Port Noarlunga, 
Spencer Gulf. 
Asperococcaceae Foslie 1890. 
Asperococcus Lamouroux 1813. 
A. bullosus Lamouroux. Investigator Strait. 
Punctariaceae Kjellman 1880. 
Punctaria Greville 1830. 
P. latifolia Greville. Eastern Bays. 
(ii.) Dictyosiphonales Setchell and Gardner 1925. — Plants 
slender and branching with growth from an apical cell, 
ultimately with parenchymatous subdivision and growth ; 
reproduction from zoospores in small, surface sporangia 
to give a microscopic filamentous gametophyte which is 
isogamous. There is one family containing some four 
genera and about 15 species. 
Dictyosiphonaceae De Toni 1891. — Not known to be 
represented here. 
(iii.) Laminariales Kylin 1917. — Plants of massive construction, 
solid or hollow, simple or branched, cylindrical to flat- 
tened, usually with holdfast, stipe and lamina as three 
distinct regions; externally parenchymatous, but often 
with a filamentous medulla; growth intercalary, and 
generally near the base in adult plants; reproduction 
from unilocular sporangia borne on general or localized 
portions of the thallus; zoospores give rise to microscopic, 
branched, filamentous, oogamous gametophytes bearing 
retained eggs and motile sperms. The order includes 
about 30 genera and 100 species and comprises 11 k* 
“Kelps”. 
