Ser. CHLOROSPERME®. Fam, Oser/latorice. 
Piatt CCCIX. 
CALOTHRIX SEMIPLENA, 4%. 
Gen. Car. Fidaments destitute of a mucous layer, erect, tufted or ag- 
gregated, fixed at the base, somewhat rigid, not oscillating. Tude 
continuous; endochrome green, densely annulated, at length dis- 
solved into lenticular sporidia. Catorurix (4g.),—from xaos, Jean- 
tiful, and Opé, a hair. 
Catorurix semiplena; filaments long, slender, tough, flexuous, densely 
interwoven into lamellated tufts; endochrome glaucous green, fre- 
quently interrupted, leaving parts of the tube empty. 
CaLoTuRIXx semiplena, 47. Bot. Zeit. 1827, No. 40. 
Catoturix lamellata, Harv. in Herb. 18441 (excl. spec. from Roundstone). 
Lynepya semiplena, J. 4g. Alg. Medit. p. 11. 
Lynesya lutescens, Lieb. (fide Kiitz.) 
LerBLeInia semiplena, Kiitz. Phyc. Gen. p.221. Sp. Alg. p. 278. 
Has. In rock-pools near high-water mark, growing on Corallina offici- 
nalis and other small alge. Kilkee, VW. H.H. Sidmouth, Rev. R. 
Cresswell. 
Geoer. Distr. The Mediterranean and Adriatic Seas, Agardh. Shores of 
Norway, dreschoug | (Alg. Scand. No. 8! growing with Callithamnion Rothii). 
Cherbourg, Lenormand (as C. pulvinata? Ag.) 
Descr. Filaments from half an inch to an inch or more in length, very slender, 
simple, waved and gently curved, but not curling, cohering firmly together 
in flattened bundles or tufts, which often expand laterally into laminew, 
which are broad below, and gradually narrowed upwards, standing erect, 
and frequently pointed. These lamine are sometimes loosely bundled 
together; at other times they are closely heaped, one on the other. The 
endochrome is dense, of a glaucous or verdegris green colour, and is fre- 
quently interrupted, leaving long spaces of colourless tube between each 
frustum of endochrome. ‘The apices of the filaments are blunt. Substance 
membranaceous, but tough, adhering to paper in drying. 
nnn nnn 
I have to apologize to the readers of the ‘ Phycologia’ for 
{o) - d to) 
having, under Pl. LXXVI. (Calothrix pannosa), confounded the 
plant now figured with a very different species. ‘The confusion is, 
however, fortunately limited to the remarks under the descrip- 
I 
tion, and to the habitats given ;—for the figure, and the whole 
te) fo) 
VOL. IIT. T 
