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THREE NEW MARINE ALG. 451 
the shade at Torquay, near high-water mark; and at Berwick I 
found it growing on the walls of caves and the perpendicular 
sides of rocks and stones, also near high-water mark. 
In the summer of 1884 my friend Mr. E. M. Holmes called 
my attention to this curious little alga, which, having received 
similar specimens from Minehead under the name of Ectocarpus 
crinitus, Carm., he had supposed to be Harvey’s plant, not 
having then seen authentic specimens. Iwas doubtful about the 
plant being identical with Harvey’s ; but until I had examined 
authentic specimens of Ectocarpus crinitus, I could form no 
accurate judgment as to whether it were so or not. Lately, 
however, by means of a series of the plant collected at Torquay 
by Mr. Holmes, and of other specimens, including an authentic 
one of Ectocarpus crinitus, which he has since put at my 
disposal, I have ascertained that my doubts were well founded. 
E. crinitus, although agreeing fairly well with my E. Holmesit 
1n ramification, is in every respect a larger and coarser plant, its 
filaments are nearly twice as thick, its articulations are longer, 
and its habit and colour quite different. .E. Holmesii seldom 
attains a greater len gth than a quarter of an inch, and is almost 
always found in fruit, whereas E. crinitus is often many inches 
long, and all the British specimens I have seen are barren. 
Dr. F. Hauck, however, has sent me specimens from Trieste 
under the name of E. crinitus which are well-fruited. 
As the plant was unknown to all the Continental algologists to 
whom I sent it, and as it appears equally unknown in America, 
I have ventured to describe it as new, and have dedicated the 
species to Mr. Holmes, whose untiring industry in the investiga- 
tion of the marine flora of our islands, and the many valuable 
additions he has made to our knowledge of British marine alge, 
are known to all algologists. 
PHYLLITIS FILIFORMIS. (Plate XVIII. figs. 1-6.) 
P. thallo circiter 1-2 cm. alto, angustissimo lineari vel fili- 
formi, e radice fibrata egrediente, olivacea, state flavescente, 
sporangiis multilocularibus, circiter 37 p longis, 7 p crassis. 
Sporangia habet P. Fascia, frondes vero multo angustiores et 
radices fibratas. 
Hab. Berwick-on-Tweed. 
This little plant grows at high-water mark in company with 
Ulothriz flacca, Calothriz Scopulorum, and other high-water 
Species. When young the fronds are olive-brown, but in age 
