196 THE JOURNAL OF BOTANY 
appendages we should regard the plant as no more than an old 
narrow-leaved and very proliferous form of D. sanguinea. 
he question whether or not H. stephanocarpum belongs rightly 
to the genus Delesseria depends on the view held of the 5 eayrers 
position of D. sanguinea (= Hydrolapathum sanguineum J. Ag.), wit 
which species our plant must stand or fall. Agardh, attaching 
primary importance to the structure of. the mature fruit, regarded 
Hydrolapathum as tase ming a distinct genus in Rhodymeniacea near 
Rhod : 
dophyllis, on account of its composite cystocarp with “nucleoli” 
separated by radiating columns of sterile threads, and on account 
of the carpostomium-structure. Schmitz, on the o 2 
i lapathum with Delesseria on of the similarity 
ms. e 
follow Schmitz and De Toni, our plant would be called Delesseria 
__ ocarpa. ur own inclination i is, however, to iolld. a middle 
would maintain Hydrolapathum as an independent genus on the 
score of the structure of its cystoca ~~ aay: sporophylis; but we 
would place it in the Delesseriee, and not in Rhodymeniacee. 
6. Preronta pectTinata Schmitz. ae Bay, South Orkneys, 
Geogr. Distr. Cape Horn, Falklands, and South Georgia. 
This species was recorded in our paper on ‘Antarctic Alege” 
(Zc. e present — n was growing attached to 
Hydr plapathuim stephanocarpum 
selatiriile or Prate 472. 
g. 1. Transverse section Bo Ara x 44. Fig. 2. Portion of 
same, showing « doetax and interior cells, x 2! 
hyllis variegata ? — Fig. 3. easieaiee section of thallus, showing 
pes yte, x 288. 
Gracilaria simplex. — Fig. 4. Transverse section of fertile frond, showing 
Hydrolapathum stephanocarpum. — Fig. 5. Portion of Rod ae » Nat. size. 
pbs Cystocarp, x 30. Fig. 7. Section of eystocarp sessile on sporophyll, 
SOME SOUTH ORKNEY ALG. 
By E. M. Houmes, F.L.S. 
following list* comprises the oe alge submitted to 
me for  idoatieation by Mr. R. N. Rudmose Brown, and, in addition, 
some fragmentary alem found sdbaehiig to these. The € specimens 
were all collected at the South Orkneys during the stay of the 
* To this list of oe tan and other alge, which Mr. E. M. Hi 3 has 
kindly drawn up for me, I have added some notes on the aisietbation of the 
Mrs. 
species. ve. , al 
5:8: Homies speeto so recorded in the lists of 
