MORE ANTARCTIC ALG 195 
_C, variegata is of common occurrence about Cape Horn and the 
Falkland Islands, and our plant may be one of its broader forms. 
4, GRACILARIA SIMPLEX nob. ( Leptosarca simplex nob. in Journ. Bot. 
1905, pp. 108, 162). Scotia Bay, South Orkneys, June, 1903. 
It is a great satisfaction to us to have received further and better- 
developed material of this plant. Our previous opinion of its syste- 
matic rank and affinities was founded on a stud 
w 
‘closely to Gracilaria, but ought to be included in that genus, at least 
next to G. Curtissie, an American species which resembles our plant 
in having its frond membranaceous and broad, though not simple. 
In G. simplex the structure of the sterile frond is markedly different 
; 1 ; 
stromatic, and the interior cells are few, large, and very thin-walled ; 
cit.). The fertile frond, 
same plant, we should have hesitated to regard them as belonging 
to one and the same species. 
We would add the following description of the sporiferous 
plant :—Frondes plures (8-10) e callo minuto orte simplices ob- 
longe vel lato-cuneate plane membranacer, 10-15 cm. long 
(apice desiructo), 3-8 cm. late, c. 230 » crasse, inferne in stipitem 
plus minusve sensim angustatum, 1-3 cm. longum attenuate, stratis 
2-8-seriatis pachydermis (frondis sterilis majoribus maxime lepto- 
dermis collabentibus submonostromaticis) ; cellulis corticalibus fila- 
menta ramosa verticalia efficientibus, tetrasporangia magna cruci- 
atim divisa foventibus (frondis sterilis majoribus monostromaticis). 
5. Hydrolapathum stephanocarpum, n. sp. Frons frutieu- 
losa 15-30 ecm. alta irregulariter dichotoma 8-4 mm. lata valde 
costata alata, ala pinnativenia sepe destructa, prolificationes nume- 
rosas lanceolato-lineares costatas pinnativenias, venis oppositis con- 
spicuis, monostromaticas usque ad 32 mm. longas et-4 mm. latas, 
€ costis emittens. Cystocarpia adparenter pedicellata, revera in 
foliolis minutis t¢ ‘ansformatis e costa emergentibus sessilia, tricho- 
903 
his species is most nearly related to Delesseria sanguinea Lam., 
from which it differs in having the cystocarps not smooth, but more 
or less clothed with simple tapering appendages, chiefly disposed 
around the sides, and leaying the top bare. But for this — of 
p22 
