Ser. CHLOROSPERMD. Kam. Oserllatorice. * 
Prats CCCXVI. 
SCHIZOSIPHON WARRENLA, Casp. 
Gen. Cuar. Frond globose or lobed, gelatinous, composed of closely- 
packed, annulated, radiating, sheathed filaments, each of which 
springs from a pellucid cell. Sheath gelatino-membranous, vertically 
cleft into innumerable hair-like shreds. ScuizosteHon (Kiitz.),— 
from cxi¢a, to divide, and oper, a tube. 
Scuizorurix Warrenie ; “ fastigiately branched; the lowest cell of the 
branches wider, hemispherical, lateral; sheaths dark-coloured, the 
fibres often spiral ; apices of the branches much attenuated.” Casp. 
ScnizosrpHon Warrenixe, Caspary in Ann. and Mag. Nat. Hist. 3rd series, 
vol. vi. p. 266. t. 8. 
Has. On rocks at high-water mark, chiefly in places exposed. to the 
dripping of fresh water. Near Mainporth, Falmouth, and at 
Plymouth, Dr. Robert Caspary. Sidmouth, Rev. R. Cresswell. 
Grocer. Distr. ? 
Descr. ‘The plant forms a solid crust over the horizontal rock, to the extent 
of many square feet, in larger or smaller patches, from 4 to} inch in thick- 
ness, throwing up on the surface little spherical elevations of different 
diameter and height.” “The colour is, in the fresh state, a dark, dull, 
blackish-green ; in the decayed, a tan-brown, and on the rocks the greater 
part of the plant is of the latter colour. It feels slimy and slippery.” 
“The stem and branches are, with the exception of the apices, enveloped 
in a sheath of brownish-green jelly. This sheath is composed of many 
funnel-shaped, gelatinous tubes, succeeding each other at little distances ; 
the upper part with its thinner end in the wider of the lower, and surround- 
ing the stem in such a way that this seems to be covered with a solid 
gelatinous mass. The upper end of each tube is split into a great many 
hair-like threads of very minute diameter, which frequently curl about in 
an irregular manner, but often represent a phenomenon very rarely found 
amongst Algze, that they form a real spiral round the gelatinous cover of 
one or two branches, or stems.” ‘“‘ I have watched the plant from the end 
of February to the beginning of May, without having found any fruit, or 
having perceived any alteration in its structure.”—Casp. J. c. p. 266-268 
(abridged). 
I have copied the specific character and description of this 
curious plant from Dr. Caspary’s account published in a recent 
number of Taylor’s ‘ Annals of Natural History,’ to which I refer 
