ALGJ5. 
101 
List of the Marine Alga of the Isle of Wight. By M. Foslie. 
(Det. Kgl. Norske Videnskabers Selskab Skrifter.) 
Some years ago M. Foslie collected marine algae during 
December, January, and a part of February, at different places in 
the Isle of Wight, especially at Ventnor and Steephill Bay, and in 
the present paper he gives us the results of his investigations. 
The list is mainly a reprint of Parkinson’s “The Marine Algae (sea- 
weeds) of the Isle of Wight,” which was based on A. Ham- 
borough’s list of the Algae in Canon Venables’s “ Guide to the Isle 
of Wight, 1860.” The additions to Hamborough’s list are not 
numerous or very important, but we were not prepared to find 
Euthora cristata amongst them. In the preface M. Foslie 
remarks : “ It is specially noted when any of the specimens found 
were provided with any kind of reproductive organs,” so that as 
no remark is added to the record of Euthora cristata f. augustata, 
we presume the specimen was barren, and suspect that it may turn 
out after all to be a very narrow form of Sphcerococcus coronopifolius, 
which we have often seen mistaken for Euthora. This is the more 
probable from the fact that with us Euthora appears to be a summer 
annual, and even in the South of Scotland has quite disappeared by 
the end of September, while M. Foslie’s specimen was gathered in 
the South of England in December or January. So far as I am 
aware, Euthora has never been found on the English coast farther 
south than Cullercoats. 
Another of the additional species Phyllitis filiformis , Batt, has 
the following note appended to it: — “ I collected an alga at Alum, 
Bay, which on the one hand reminds one of Ph. Zosterifolia , Eke., 
but on the other hand seems to be so nearly related to Ph , 
filiformis , Batt., that any limit hardly may be drawn. The plant 
grew gregarious in rather large numbers on sand-covered stones in 
the lower part of the litoral region. It is 4-6 c.m. long, 80-250 p 
broad, and the thickness in proportion to the breadth as 1-3 or 1-4, 
and rises from fibrous rootlets. Specimens collected in the middle 
of February were sterile. If it, as to the organs of reproduc- 
tion, proves to correspond with Ph. filiformis , the latter probably at 
most is to be regarded as a form of P. zosterifolia. It may be 
remarked that also other species growing in certain localities rise 
from fibrous rootlets or develop rhizoids instead of a typical disc- 
like base.” We do not think that M. Foslie’s plant is really Ph. 
filiformis , which may readily be distinguished in the barren state 
from other species of Phyllitis by the cortical cells being arranged 
in regular longitudinal rows, while they are irregularly placed in 
Ph. zosterifolia , etc. Moreover, Ph. filiformis , so far as we have 
observed it, is always in fruit in February, by the end of which 
month but very few specimens remain; it also grows at high-water 
mark, not in the “ lower part of the litoral region,” and is caespitose 
in habit. 
In compiling his list Mr. Parkinson rejected some of Ham- 
