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PACIFIC SCIENCE, Vol. IX, October, 1935 
Fig. 7. Cladophoropsis magnus n. sp. a y A single 
filament showing branching (X 2.5); b y central part 
of a filament with crowded branches (X 12). 
(1-2 cm. high) of entangled rhizoids. Upper 
filaments sparsely branched, of uniform width 
throughout, (300-) 400-570 /jl wide; wall 
lamellate, 6-10 fi thick; main filaments with- 
out septa, lateral filaments with a single sep- 
tum at their base. Rhizoidal basal filaments 
irregularly branched, sometimes swollen in 
places, 60-250 /x wide, with or without septa 
at base of branches. 
Thallus erectus, fasciculus, ad 10 cm. altus, 
cum bulbo ad basem rhizoidum implicatorum 
(1-2 cm. altus). Filamenta interdum ramosa, 
linearia (300-) 400-570 /x diam., membrana 
lamellata, 6-10 /x crassa; filamenta prima sine 
septis, filamenta lateralia cum septo ad basem. 
Rhizoides irregulariter ramosi, interdum tu- 
mite, 60-250 /x lati. 
type locality: Queenscliff, Victoria. 
type: MEL (see Fig. 9). 
distribution: Known only from the type 
locality and from Pennington Bay, Kangaroo 
Island (outer pools on rough reefs, AD No. 
A 2223, H. B. S. Womersley, January 25, 
1944) and drift (AD No. 2818, H. B. S. 
Womersley, January 28, 1946). 
This species had been recognised as dis- 
tinct by Sonder, but never published. Sender’s 
specimen (called Cladophora (Aegagropild) 
bulbosa) (in MEL) is the best seen and is 
chosen as the type. Apparently it is a rare 
plant, known from only three collections. The 
habit and dimensions separate it readily from 
other described species of Cladophoropsis , 
which are listed by Papenfuss (1950: 211). 
Order DASYCLADALES 
Family DASYCLADACEAE 
Dasycladus densus n. sp. 
Figs. 10, 11 
Fronds with 1-16 simple, erect axes, arising 
from a basal holdfast attached by short rhiz- 
oidal processes. Axes to 6 cm. high, 2-4 mm. 
thick, consisting of a central siphon (to 1 mm. 
broad) with a thick lamellate wall, bearing 
crowded whorls of branches, 10-12 branches 
per whorl. Branches with segments of 3 
orders; primary segments producing from 
their apex 4 (3-5) secondary segments, these 
in turn forming 2 (-3) tertiary segments. 
Fig. 8. Cladophoropsis hulbosa n. sp. a, Upper branch of 
thallus (X 8); b, rhizoidal base of a filament (X 8). 
