Ser. CHLOROSPERMEA. Fam. Confervee. 
Pruate CCXVI. 
CLADOPHORA FALCATA, Za. 
Gen. Cuar. Fidaments green, jomted, uniform, branched, uit, aggre- 
gated granules or zoospores, contained in the joints, having, at some 
period, a proper ciliary motion. CxiaporHora (K7tz.),—from xAados, 
a branch, and dopew, to bear. 
CiaporHora falcata; densely tufted, dark-green ; filaments intricate at 
the base, ultra-capillary, ngid, much curved, irregularly branched ; 
branches "zig-zag, repeatedly divided, the lesser divisions arched, or 
strongly incurved and falcate, furnished along their inner faces with 
short, secund, blunt ramuli; articulations three or four times longer 
than broad, with a dense endochrome, and pellucid dissepiments. 
Ciapopuora falcata, Harv. in Herb.—Phy. Brit. vol. i. p. 14. 
Has. The bottoms of clear rock-pools, near low-water mark. Annual. 
Summer. Rocks outside Dingle Harbour, Kerry, V7. H. HZ. (1845). 
Jersey, Miss White. 
Groer. Distr. British Islands. 
Descr. Filaments densely tufted, somewhat interwoven and entangled at the 
base, three or four inches high, thicker than human hair, nearly of equal 
diameter throughout, much branched and repeatedly divided. Branches 
curved and twisted, or curled in various directions, irregularly divided; the 
lesser branches sometimes alternate, sometimes secund, and sometimes two 
or three springing from the same point, all very erect, arching or strongly 
hooked inwards, furnished on their concave side with numerous secund 
ramuli of unequal length, long and short occurring alternately, the shorter 
ramuli simple, formed of one or two cells; the longer bearing a second 
series on their faces, and hooked like the branches. The aspect of the whole 
tuft is peculiarly crisp and squarrose. 4rticulations tolerably uniform, 
three or four times as long as broad, with hyaline borders and dissepiments, 
and containing a dense endochrome, which partially recovers its form after 
having been dried. Colour, a rich, glossy, full green. Substance rigid and 
crisp, adhering to paper in drying. 
I gathered a few specimens of the Cladophora here figured in 
the summer of 1845, in some deep rock-pools, near low-water 
mark, under a steep mural cliff, in a situation where the fronds 
were constantly in shade. More recently I have received from 
Miss White specimens collected at Jersey, which agree in most 
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