Notes on Marine Algae of New Zealand. I. 
Victor W. Lindauer 1 
As would BE EXPECTED, considering its geo- 
graphical position, New Zealand has always 
attracted the attention of the scientific collec- 
tor, and it may, therefore, seem strange that 
certain conspicuous marine algae have hitherto 
escaped critical examination and, in some cases, 
have been overlooked entirely. This series of 
papers will deal with such, together with oc- 
casional notes on the New Zealand algal flora 
generally. 
Family PHAEOPHYCEAE 
Ectocarpus bracchiolus sp. nov. 
Fig. 1 d-i. 
Frondibus minutis, 4 mm. altis, epiphyticis, 
orientibus e massa densa filorum serpentium; 
thallis tortuosis, eandem latitudinem semper 
servantibus, 15-24 fx latis, cacuminibus obtusis, 
articulis 1-4-plo latioribus, ramis raris, secun- 
datis vel irregularibus, longis, saepius simplici- 
bus, divaricatis, subapicaliter crescentibus, 
chromatophoris patinae similibus, nullis capil- 
lis; sporangia unilocularia non visa; sporangiis 
plurilocularibus (1) terminalibus, erectis, 51- 
62 fx longis, 34-45 /x latis, positis in pedicellis 
0.5 mm. altis e cellulis 12 vel pluribus constan- 
tibus; (2) lateralibus, sessilibus vel cum pedi- 
cellis unicellularibus, 62-72 fx longis, 48 fx latis, 
saepius ad fila ad angulos rectos vergentibus. 
Fronds minute, 4 mm. high, epiphytic, arising 
from a dense mass of creeping filaments; thalli 
tortuous, of same width throughout, 15-24 /x 
wide, tips obtuse, articulations 1-4 times width, 
branches sparse, secund or irregular, long, mostly 
simple, divaricating, growth subapical, chroma- 
tophores plate-like, hairs absent; unilocular 
1 Senior Research Fellow in the University of New 
Zealand at Auckland. Manuscript received March 29, 
1949. 
sporangia not seen; plurilocular sporangia (1) 
terminal, erect, ovoid-acuminate, 51-62 /x long 
and 34-45 /x wide, on pedicels 0.5 mm. high of 
12 or more cells; (2) lateral, oval to ovoid, 
often bifurcate, sessile or with pedicels of 1 
cell, 62-72 /x long and 48 /x wide, most often at 
right angles to the filament. 
E. bracchiolus has affinities with E. rhodochor- 
tonoides Boerg. but the dimensions of its cells 
and the shape and position of its plurilocular 
sporangia are different. On the other hand, the 
sporangia more closely resemble, but are not 
identical with, those of E. breviarticulatus J. A g., 
being both shortly stalked and inserted at right 
angles, but the vegetative thallus shows impor- 
tant differences. In this connection it approaches 
more closely E. variabilis Vickers in which the 
cells are much shorter and of nearly the same 
length throughout. 
Distribution: On Cladophora colensoi, in 
pools, covering part of the filament with a low, 
soft, yellowish, hairy fringe. Pegasus, Stewart 
Island, the type locality; in the early autumn. 
Type specimen, No. 9975, Herbarium Lin- 
dauer. 
Sphacelaria stewartensis sp. nov. 
Fig. 1 a-c. 
Frondibus parvis, cristatis, epiphyticis, 4-5 
mm. altis, orientibus e dense aggregatis in- 
trudentibus filis, axibus primariis thallorum per- 
currentibus, 30-42 /x latis, cum paucis rhizoidi- 
bus descendentibus, axe mox subraro egerente 
pinnas longas, simplices vel sparse ramosas, 15- 
24 ix latas, axi primario similes, cacuminibus ob- 
tusis sed numquam conspicuis, interdum subat- 
tenuatis; articulis saepius longioribus quam 
latioribus, parte superiore paris cuiusque cel- 
lularum maiore quam parte inferiore et pericys- 
1 340] 
