ANTARCTIC ALGE 107 
7. Procamrum Hooxert Harv. South Orkneys, Bay A, 9-10 
fathoms, Aug. 29,1908; April, 1903; May, 1903. 
The last imen is so covered with diatoms as to be un- 
recognizable until it is cleaned. 
Geogr. Distr. Kerguelen, Heard Island, South Georgia. 
8. P. coccrneum Lyngb. South Orkneys, Scotia Bay, Dec. 1908. 
‘Bay A, 9-10 fathoms, May, 1903. 
eogr, Distr. Cosmopolitan. 
irregulariter dichotomi. Ramuli ultimi membranacei, ligulati vel 
cuneato-ligulati, usque ad apices obsolete et simpliciter costati, irre- 
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prolifera, using Delesseria in the old wide sense. But at genus, 
as emended by J. G. Agardh, is now so limited in its. scope that we 
are compelled to refer the plant to Pteridiwm, although we regard it 
and certain other genera latterly split off Delesseria a: 
allied to be worthy of generic rank. In our species the m i 
branching is very much masked by the abundant proliferations. 
i differs 
having no lateral veins. From P. plewrosporum it differs in being 
very proliferous, and in the sori not being confluent over the costa. 
e sori, in fact, resemble those of Hypoglossum denticulatum as 
figured in Kiitzing’s Tab. Phye. xvi. tab. 15, 1 ‘== Pteridium spinu- 
costa and frond. It differs from Reinsch’s i nsata in 
having a much less strongly marked costa, and in being proliferous. 
10, Preronta pectinata Schmitz (= Polysiphonia pectinata Hook. 
& Harv.). South Orkneys, Scotia Bay, Dec. 1903. : fe AS 
Geogr. Distr. Cape Horn, Falklands, South Georgia. ae 
_Reinsch (i. ¢. p. 874), in his note on this plant, says he believes 
Le oe 
