Ser. CHLOROSPERMER. Fam. Confervee, 
PyaTe XIT. 
CLADOPHORA RECTANGULARIS, Gri. 
Grn. Cuar. Fi/aments green, jointed, attached, uniform, branched. Prat, 
aggregated granules or zoospores, contained in the joints, having, at 
some periods, a proper, ciliary motion. CLADOPHORA—from xddédos, 
a branch, and gopéw, to bear; a branching plant. 
CrapopHora rectangularis ; filaments setaceous, rigid, forming intricate 
tufts ; branches opposite, distant, elongated, patent, furmshed through- 
out with short, opposite, horizontal ramuli; articulations twice or 
thrice as long as broad. 
ConFerva rectangularis, Grif. MSS. Hare. in Hook. Br. Fl. vol. ii. Addenda, 
p- 10. Wyatt, Alg. Danm. no. 145. Harv. Man. p.135. 
Conrerva Crouani, Chauv. MSS. sec. Berk. in Itt. 
Has. In the sea, at depths beyond the influence of the tides. Annual. 
Summer. Torquay, cast on shore, very rare; Mr. Borrer and Mrs. 
Griffiths. Galway, Mr. Reilly. Dredged in Roundstone Bay, county 
of Galway, in 4-6 fathoms, very abundant, Mr. W. Calla. Abun- 
dant at Great Arran,Galway Bay, Wr. Andrews. 
Geogr. Distr. South of England, very rare. Abundant in certain districts of 
west of Ireland, but very local. Coast of Normandy. 
Desc. Filaments as thick as horse-hair, 8-12 inches long, forming tufts which 
are often much entangeld together, divided irregularly into three or four 
principal branches, or with an undivided stem. Branches very patent, 
issuing nearly at right angles, distant, opposite, or by abortion occasionally 
alternate, simple, or furnished with a second series of lesser branches which 
are equally patent and opposite, rarely naked, mostly furnished throughout 
their length with short, opposite, horizontal, simple, jomted ramuli, which 
issue either from every joint of the branches and stem, or at every third or 
fourth joint. These are occasionally ternate or quaternate. The ramuli 
vary considerably in relative length in different specimens, being in some 
individuals (as in fig. 1) not half a line in length, in others (fig. 3) 3-5 
lines; and, in a specimen now before me, from half an inch to an inch. 
In this last case the long ramuli are comparatively few, and mixed with 
others of the usual length. Colowr, a full, bright green, fading in the 
herbarium. Substance when quite fresh, crisp and rather rigid, soon be- 
coming flaccid, but never adhering strongly to paper. Articulations of uni- 
form length throughout the plant, twice or thrice as long as broad; joints 
slightly contracted. 
A beautiful species, discovered in the year 1832 by Mr. Borrer, 
washed up on the beach at Torquay, and occasionally found, but 
very rarely, in the same locality by Mrs. Griffiths and Mrs. Wyatt. 
Of the date of its discovery in Normandy I am not informed, 
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