NEW BRITISH MARINE ALG.E. 
91 
referable to the typical form, in which the tetraspores are borne on 
very short filaments, usually consisting of from one to three cells, 
and consequently only just appearing through the tissues of the 
Sertularia. The difference between specimens of the typical 
form and those of the variety is so great that one can at first sight 
hardly believe they belong to the same species. 
Leptonema fasciculatum, Rice., f. subcylindiica, Rosenv ., l.c ., p 
879 \ 
As has already been remarked in this journal, No. 102, p. 57, 
British specimens of Leptonema fasciculatum do not produce the 
projecting Ectocarpoid sporangia figured by Dr. Reinke and 
Herr Gran, the portion of a fertile filament bearing plurilocular 
sporangia being only slightly thicker than the sterile portion, the 
beaks of the several chambers only slightly projecting. To 
this variety Herr Rosen vinge has given the above name. 
Ectocarpus Stilophoree, Crouan. Yar. csespitosa, Rosenv., l.c., p. 892. 
Plurilocular sporangia collected into dense tufts, linear, 4-6 p in 
diameter, uniseriate. 
Mr. T. H. Buffham has very kindly sent us for examination a 
slide of an Ectocarpus (gathered at Weymouth), which appears to 
be identical with this variety of Ect. Stilophorce , described by 
Rosenvinge. 
Mr. E. M. Holmes, F.L.S., has kindly sent us the following note 
on another New British Marine Alga : — 
“ Vaucheria cozonata, Nordst. 
This species was found by Mr. J. Jack, at the Mason’s Cove, 
near Arbroath, bearing fructification in May, 1893. It forms a 
dense cushion about | inch in height, but extending for many inches. 
It grows near high water mark.* This species has not hitherto 
been detected in Britain, but has probably been overlooked, owing 
to the fruit not being regularly scattered over the tufts, but 
abundant in one part, and entirely absent in another. I have seen 
apparently the same plant both at Berwick-on-Tweed and near 
Sidmouth, but have never before been able to detect oogonia. I 
have generally met with it in small caves or on damp, rocky ledges 
near the shore of the open sea, where it would be somewhat shaded 
from the sun, but exposed to the wash of high tide, and possibly to 
ffesh water draining through sandstone rock. Probably like many 
other Vauclierice , it fruits both in spring and autumn. When in 
fructification it is one of the most easily recognized species, owing 
to the oogonium being surmounted by a minute crown of 3-6 
small tubes, but which in a dried state appear like folds or plaits 
rather than tubes. 
The original description is given in “ Botaniska Notiser,” 1879, 
pp. 177, 178. For the benefit of those British algologists who may 
not have access to that publication, the description is here tran- 
scribed. 
* Dr. Nordstedt describes the plant as growing in damp, grassy places 
about Oiesund, fruiting in the autumn. 
