Ser. CHLOROSPERME2. Fam. Oscillatorice. 
Prats LXXVI. 
CALOTHRIX PANNOSA, 4. 
Grn. Cuan. Fi/aments destitute of a mucous layer, erect, tufted or aggre- 
gated, fixed at the base, somewhat rigid, not oscillating. Zude con- 
tinuous ; endochrome green, densely annulated, at length dissolving 
into lenticular sporidia. Catorurtx (4g.),—from xadds, beautiful, and 
Opis, hair. 
CaLorurix pannosa; filaments elongate, rigid, very much curled and 
twisted, obtuse, densely mterwoven together into lamellated tufts or 
honey-combed strata; endochrome blackish green, densely annulated. 
CALOTHRIX pannosa, 4g. in Bot. Zeit. vol. x. p. 635. no. 42. Endl. 3rd 
Suppl. p. 13. 
CaLoruRix lamellata, Harv. in Herb. 1842. 
Has. Near high-water mark, growing either on rocks, on Pueus canalicu- 
latus, or on Corallina officinalis, &e. Perennial. Kilkee, W.H. H. 
Roundstone Bay, Mr. Me’ Calla. Sidmouth, Rev. R. Cresswell. 
GeEoeR. Distr. Adriatic Sea, at Trieste, C. Agardh. 
Descr. Filaments rigid, from a quarter to half an inch in length, very much 
curled, equal in diameter throughout, obtuse, very densely and intricately 
woven together, forming thi nlamine, which are either packed together in 
an irregular stratum with a bristling surface, or arranged with some regularity 
in a manner resembling honey-comb, small roundish or angular spaces being 
left between the laminz, which unite at the edges in a sort of net-work. 
According to the object on which it grows, the plant varies; that on the 
rock beg more regularly honey-combed, and also more luxuriant than 
that which grows on Alge. Endochrome dark green, closely annulated with 
strongly marked strie. 
RRA RAI 
I first observed this species at Kilkee, in the spring of 1542, 
growing on Corallina officinalis, in rock pools near high water 
mark, a situation occasionally selected by the Coralline, but 
where it seldom reaches perfection. Believing at the time that 
my specimens belonged to an undescribed species, communicated 
them to several friends under the manuscript name, C. /amellata. 
More recently I was pleased at receiving the same plant from the 
Rev. Mr. Cresswell, of Sidmouth; and last summer, when at 
Roundstone, Mr. Mc’ Calla pointed out to me a locality m which 
it grows in great abundance and perfection, spreading over every 
u2 
