Ecology of Kermadec Islands — CHAPMAN 
349 
Fig. 1. Bryopsis kermadecensis. a, Base of pinnule 
showing constriction and plug of protoplasm; b, apex 
of pinnule; c, plant (X 2); d, pinnule. 
t Bryopsis kermadecensis sp. nov. (Fig. 1). 
Plantis 1.5 cm. longis, axe primario 
distincto, simplici, 149-158 p dia., 
pariete 6-6.5 p crasso, partibus in- 
ferioribus nudis; pinnulis inferioribus 
caducis, pinnulis superioribus radiali- 
ter dispositis, basi constrictis, apici 
obtusis, 44-61 p dia. 
Plants 1.5 cm. long, main axis distinct, 
unbranched, 149-158 p diam., wall 6- 
6.5 p thick, lower part bare below; 
lower pinnules deciduous, upper pin- 
nules radially arranged, constricted at 
the base, obtuse at the apex, 44—61 
p diam. 
Type specimen in Lind. Herb. Auckl. 
Univ. 
This species is very close to B. der- 
besioides Chapm., but differs in its 
smaller size and the greatly constricted 
bases of the branches. The diameter 
of the pinnules is also more uniform 
and the apices obtuse rather than ta- 
pering. It appears to be smaller than 
other species of Bryopsis recorded 
from the Australian mainland. For the 
present, therefore, it has been re- 
garded as a new species, though ex- 
tensive collecting will be necessary be- 
fore any further decision can be made. 
On Corallina in sublittoral pool, Fish- 
ing Rocks. 
G * C odium dichotomum (Huds.) S. F. 
Gray f. novozelandicum Dellow. This 
is the plant recorded by Gepp as C. 
tomentosum . (See Chapman, 1956.) 
Codium adhaerens (Cabr.) Ag. var. 
convolutum Dellow. Sublittoral, One- 
rahi Bluff. 
f Caulerpa racemosa ( Forsk. ) J. Ag. var. 
peltata (Lmx.) Eubank, Mid-tide pool, 
Fishing Rocks. 
G Caulerpa racemosa (Forsk.) J. Ag. var. 
uvifera (Turn.) J. Ag. f. intermedia 
Web. van Bosse. Fishing Rock, mid- 
littoral pool: sublittoral, 12 m., and 
sublittoral fringe, Meyer I. 
t Caulerpa webbiana Mont. Deep pool, 
mid-tide, Fishing Rock with Corallina\ 
sublittoral, 12 m., Meyer I. 
PHAEOPHYCEAE 
Dictyotales 
G Dictyota prolificans A. & E. S. Gepp. In 
red turf, Hutchinson’s Bluff, mid-lit- 
toral. 
CG Taonia australasica (Kiitz.) J. Ag. Sub- 
littoral, 4—8 m., Meyer I. 
CG Pocockiella nigrescens (Sond.) Papenf. 
Pool, Boat Cove: in Corallina turf, 
sublittoral, Fishing Rocks. 
Padina fraseri (Grev.) J. Ag. (Lin- 
dauer, 1957). 
Hydroclathrus clathratus (Bory) Howe 
(Lindauer, 1957). 
C * Haliseris kermadecensis Cotton 
Sporochnales 
C * Perithalia capillaris J. Ag. 
Dictysiphonales 
Colpomenia sinuosa (Roth.) Derb. et 
Sol. Fishing Rocks. 
Fucales 
C * Sargassum sinclairii Hook, f . & Harv. I 
think some doubt attaches to this iden- 
tification. 
G Sargassum fissifolium (Mert.) C. Ag. 
Fishing Rock, mid-tide pool: also in 
the sublittoral fringe, Lava Pt. 
Carpophyllum phyllanthus, C. plumo- 
sum, C. maschalocarpum, Durvillea 
antarctica, and H ormosira banksii 
have all been recorded from the drift 
(Cotton, Gepp) but there is no evi- 
