i I
the name here quoted. I am not aware whether it has been
published by Chauvin. It is nearly related in structure to M.
strangulans but differs something in habit, forming a much larger
and thinner spot on the fucus.
A . Fig. 1. Portion of the frond of Eliodymmia palmata with Myrionema Leclancherii
gi-owing upon i t :— natural size. 3. Myrionema Leclancherii. 3. Portion
of the same. 4. Filaments from the same. 5. Filaments and spores
in situ :— all more or U
P l a t e XLI. (A ).
MYRIONEMA PUNCTIFORME, Harv.
M.YPiVM'm.A p u n c tifo rm e ) patches globose; filaments tapering to the base;
spores Hnear-obovate, affixed to the vertical filaments near their base.
M y e io n em a p u n c tifo rm e , Harv. in Hook. Br. M. vol. ii. p . 391. Man. p . 124.
L in k ia p u n c tifo rm is, Lyngl. Hyd. Ban. t. 6 6 . Oarm. Alg. App. ined. cum
icone.
H a b . Parasitical on the Plorideai. Annual. Summer and Autumn On
Clirysimeuia elavelloaa, at Appin, Capt. Carmichael. On Ceramium
rubrum, at Torquay, Mrs. Criffiths.
G e o g e . D i s t e . Shores of Europe.
D e s c e . Fronds o r p a tc h e s v e ry m in u te , h a lf a lin e o r le ss in d iam e te r, fla ttish
o r g lobose, com p o sed o f v e rtic a l th r e a d s r a d ia tin g from a sm a ll b a se . Filaments
s lig h tly ta p e r in g to th e b a s e , w ith jo in ts tw ic e o r th ric e as lo n g as
b ro a d . Spores sessile n e a r th e b a s e s o f th e e re c t filam en ts, v e ry n a rrow in
p ro p o rtio n to th e ir le n g th , a n d m u c h a tte n u a te d a t th e b ase.
This httle parasite is obviously nearly akin to M. Leclancherii,
from which its globose fronds or patches, and more narrow spores
distinguish it. It comes nearer to M. strangulans, hut differs
in the position of the spores. The only specimens which I
have seen were collected by Mrs. Griffiths several years ago.
They were found on Ceramium rubrum, which they covered nearly
as closely as the warts of fructification cover Stilophora rhizodes.
Probably, if looked after, it may he found on many of our coasts.
It was added to the British Flora by the late Capt. Carmichael,
of Appin, whose many discoveries in minute botany have rendered
his name familiar to most algologists.
B. Fig. 1. Ceramium rubrum with Myrionema punctiforme parasitical upon i t :—
natural size. 2. Branch of the same. 3. Vertical section of part of the
Myrionema. 4. Filaments with spores. 5. A Spore:—all more or less
highly magnijied.