CCCr.
I
P l a t e CCCV.
CALOTHRIX CÆSPITULA, Haw.
e l l i l T i , I E . K e e v e ,
Gen. C h a r. Filaments destitute of a mucous layer, erect, tufted or aggregated,
fixed at the base, somewhat rigid, not oscillating. Tube
continuous; endochrome green, densely annulated, at length dissolved
into lenticular sporidia. C a l o t h r ix from mXof, ’
and 6pi^, a hair.
Ca lotheix caspitnla; filaments forming close, convex, blackish-green
tufts, densely packed, flexuous, flaccid, obtuse, not attenuated, here
and there spuriously b ra n c h e d ; border of the filaments narrow.
Calothrix cæspitula, H a n . in Hook. Br. Ft. vol. ii. p. 369. Harv. i
FI. Hib. part 3. p. 337. Harv. Man. ed. 3. p. 335.
L e ib l e in ia cæspitula, Kg. Sp. Alg. p. 378.
H ab. Marine rocks, near high-water mark. Annual ? Summer. Miltown
Malbay, 1831. { W .H.H.)
G eogk. D is t r . ? Adriatic (Kiitzing).
D esc e . Tufts very convex, from a quarter inch to an inch and a half in diameter,
hemispherical or irregular in outline, deep blackish-green, fiaccid, yielding
10 the touch, growing either on the naked rock or on corallines, sheUs, &c.
Filaments densely packed together, often twisted round each other in small
bundles, either simple or appositionally branched, obtuse, cylindrical, not
tapering to either end ; branches erect. Endochrome dense, filling the tube ;
the striæ dense and strongly marked ; border narrow.
I can say but little respecting this species, although I am responsible
for having originally given it a name. The specimens
gathered by me in 1831,—from one of which, assisted by a
sketch made at the time from the fresh plant, the plate now
given has been prepared,— were collected in rock pools of salt
water into which the sea only flows at spring tides, situated at
the extremity of “ Spanish Point,” Miltown Malbay. I have
repeatedly sought for the plant on subsequent visits to the west
coast, but never successfully, nor have I received specimens
from any correspondent. The only continental author who has
VOL. i n .