290 NOTES ON BRITISH DESMIDIEA. 
cystocarp can be ascertained. It may be here observed that, 
when the frond of Phyllophera palmettoides is examined under a 
low power (4 inch), it appears to be mottled with pale rounded 
ts. These are seen careful focussing with a higher power 
) 
menia 
been a specimen of P. palmettoides, since states that the cystocarps 
have the structure of Phyllophora, and that the internal cells are 
shorter than those of R. Palmetta. indeed, a sample I have 
received labelled Halymenia Nic@ensis Duby, from Macncillaa, which 
had cystocarps, proved to have the short or rounded hexagonal 
toides, and presented when moistened the incurved margins of the 
frond characteristic of that plant when akssc but which I have 
never observed in R. Nicaensis. other specimen without frui 
from the same locality presented branching lateral root- like fibres, 
different in character from the stolons of R. Nicwens 
Kiitzing’s figure of Clee Nicaensis represents the cysto- 
carp as Scmpansce 3 in the frond, and not attached by a short pedicel 
as Agardh describes it. Kiitzing’s figure exhibits also the charac- 
teristic creeping stem of R. Niceensis. Dr. Ha however, is of 
opinion that there is in the Mediterranean a Phyllophora with 
reeping toes which otherwise resem palmettoides, an 
this plant he has seen cystocarps, remap and antheridia. 
e nas also met with a form of R. Palmetta with creeping stems in 
the Mediterranean, Pie with eystocarps evidently those of a 
Rhodymenia. hese I have not seen. It is obvious, however, 
that the position of the tetraspores shea cystocarps, and se — 
stem of Harvey’s plant well distinguish it from R. Palmet 
NOTES ON BRITISH DESMIDIF2.—No. 2. 
By W. Josnuva, F.L.S. 
Since my last notice (Journ. Bot, 1882, p. 800) I have to record 
the following species, most of which are rare, if not entirely new 
to our flora :— 
Closterium goer um Wittr. — paige rare species with finely 
developed zygos was present in fair abundance, with a few 
examples of Poe digitus also poe BS in @ gathering made by 
