FLoOaXXYII.
P l a t e XXVII.
WRANGELIA MULTIFIDA, J.Ag.
Gen. Chau. Frond purplish or rose-red, filamentous, jointed ; filaments
single-tubed. Fructification of two kinds, on distinct individuals ;
1, tetraspores affixed to the inner face of the ramuli (not confined
to involucres) ; 2, gelatinous receptacles [favellæ) terminating- the
branches, surrounded by an involucre, and consisting of several clusters
of pear-shaped spores, compacted together. W r a n g e l i a [ A g )
in honour of Baron von Wrangel, a Swedish naturalist.
W rangelia multifida ; stems setaceous, pinnate or bipinnate, articulated,
each joint bearing a pair of opposite, slender, pinnato-multifid, incurved
ramuli, or whorled with numerous sub-dichotomous ramuli;
joints of the stem many times longer than broad.
Wrangelia m u ltifid a , / . Ag. Alg. Medit. p. 7 9 . Btidl. 3 rd Suppl. p. 3 5 .
Geifeithsia multifida, Ag. Syst. Alg. p . 1 4 3 . Ag. Sp. Alg. vol. ii. p . 1 3 3 .
Harv. in Hook. JBr. El. vol. ii. p . 3 3 8 . Harv. in Mack. El. Hib. vol. iii.
p . 3 1 2 . Harv. Man. p. 1 0 3 . Wyatt. Alg. Banm. No. 4 3 . M ’cCalla,
Alg. mb. No. 1 .
C a l l it h a m n io n m u ltifid um , Kiitz. Phyc. Gen. p . 3 7 3 .
Cbbamium v e rtic illa tum , Bucluz. sec. Ag.
Ceramium Casuarinæ, B.C. El. Gall. Syn. p. 8.
Conferva m u ltifid a , Hudson El. Ang. 5 9 6 . Sm. E. Bot. 1 . 1 8 1 6 . Billw. Conf.
Syn. p. 75.
Var. SiPilfiera; ramuli very long, simple and hair-like.
Geifeithsia multifida Ag. I. e. Harv. I. c.
H ab. On the perpendicular sides of deep marine pools near low-water
mark, under the shade of other Algæ. Frequent on the southern
shores of England ; and west of Ireland. BeKast Bay, Mr. Thompson.
Jersey, Miss White, Miss Turner. Rare in Scotland ? Saltcoats
(floating). Miss Margaret Landshorough.
Geogr. Distr. Atlantic coasts of Europe. Rare in the Mediterranean sea.
D escr. B.oot a c com p an ied b y irre g u la rly b ra n c h in g fibre s. EUaments 4—3
in c h e s h ig h , as th ic k as h o g s ’ b ris tle s , g en e ra lly u n d iv id ed , h u t fu rn ish e d
th ro u g h o u t th e n le n g th w ith la te ra l, o p p o s ite or a lte rn a te sp re ad in g , d is tich
o u s o r sp ira lly q u ad rifa rio u s , sim p le b ran ch e s simUar to th e stem ; a n d
lik e i t h e a lin g a s e co n d o r even a th i r d series, w h ich g rad u a lly b e com e m o re
a n d m o re slen d e r. Stem a n d branches jo in te d , th e a rtic u la tio n s v e ry v a riab le
in le n g th in d iffe ren t sp ecimen s, 5 - 1 0 tim e s lo n g e r th a n b ro a d , sin g le tu b e d ,
w ith a v e ry w id e h y a lin e b o rd e r, ea ch b e a rin g a t a s h o rt d is ta n c e below th e
jo in t e ith e r a p a ir o f s len d e r, o p p o s ite p in n a to -m u ltifid ramuH (w h ich seems
to b e th e n o rm a l s ta te o f y o u n g in d iv id u a ls ), o r, as sh own in om- figure,
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