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PACIFIC SCIENCE, Vol. IX, October, 1955 
Fig. 1. Bryopsis minor n. sp. Habit of branch (X 10). 
with the lower edge more or less straight, the 
upper curved. 
Thallus ad 25 cm. altus. Surculus crassus, 
2-3 mm. diam., teres. Caules crassi, nudi infra, 
irregulariter ramosi. Axis ramorum super- 
iorum compressa, 1-2 mm. lata, cum distichis 
ramentis. Ramenta compressa, 4-8 mm. long., 
circa 1 mm. lata, fusiformia; labrum inferior 
plus minus directum, labrum superior flexum. 
type locality: Elliston, on the west coast 
of Eyre Peninsula, South Australia. 
type: AD (No. A 13,426 H. B. S. Womers- 
ley, January 13, 1951). Isotypes distributed 
under this number. 
distribution: Known only from the type 
locality (H. B. S. Womersley, January 13, 
1951 and February 14, 1954). 
C. ellistoniae is most closely related to C. 
scalpelliformis , but differs in having branched 
erect fronds and in the size and shape of the 
ramenta. In the former the ramenta are 
straight on the lower edge and curved on the 
upper, while the opposite usually occurs in 
C. scalpelliformis. 
C. ellistoniae has been found only at Elliston 
in the drift after rough weather, in January, 
1951, and February, 1954. It probably grows 
in deep rock pools on rough reefs. 
Family CODIACEAE 
Chlorodesmis australis n. sp. 
Fig. 3 
Thallus to 1.5 cm. high, medium to dark 
green, in loose tufts. Branching only at the 
base, with up to 4 dichotomies close together. 
Filaments constricted immediately above each 
dichotomy, above linear and simple, 25-45 m 
wide. Cell wall thin, slightly thickened at basal 
constrictions. Base somewhat entangled, co- 
lourless, attached by short rhizoidal proc- 
esses. Chloroplasts dense and numerous, 
round to ovoid, 1.4-2. 7 \x across. 
Thallus ad 1.5 cm. altus, viridis aut fusco- 
viridis, in fasciculis laxis. Rami solum ad 
basem dichotomi. Filamenta constricta supra 
omnia dichotoma, supra linearia et simplicia, 
25-45 m diam. Basis sub-implicata, sine colore, 
cum rhizoidis. Chloroplasti densi et multi, 
circuli aut ovati, 1.4-2. 7 m diam. 
TYPE locality: Robe, South Australia (in 
pools at rear of rough reefs). 
type: AD (No. A 12,250, H. B. S. Womers- 
ley, August 28, 1949). 
Fig. 2. Caulerpa ellistoniae n. sp. Type. 
distribution: Known only from the type 
locality and from Pennington Bay, Kangaroo 
Island (H. B. S. Womersley, with Chlorodesmis 
pusilla , sub. no. A 7020), in pools at rear of 
rough reefs, January 1948. 
