Puate CCCLIV. B. 
RHIZOCLONIUM CASPARYI, n. sp. 
(For Gun. Cuar. see Plate CCXXXVIII.) 
Ruizoctonium Casparyi; filaments elongated, extremely slender, decum- 
bent, pale yellow-green, stratified, interwoven, curved and here and there 
angularly bent; at the angles emitting short root-like branches, 
which sometimes lengthen, and are filled with endochrome ; articula- 
tions 2-6 times longer than broad, with narrow dissepiments and gra- 
nular endochrome. 
Has. At Falmouth and Penzance, Dr. Robt. Caspary. 
Descr. Forming a thin web of a bright green colour and considerable extent. 
Filaments elongate, more slender than those of 2. riparium, gracefully curved 
rather than twisted, interwoven, here and there angularly bent. At the 
angle issues a root-like process, which sometimes consists but of a few empty 
cells; at other times lengthens out into a branch. Ce//s in the same fleece 
very various, and even in the same filament at different ages: the full- 
grown cell seems to be fully six times as long as its diameter; but short 
cells once and a half to twice as long as broad, which seem to be cells in 
process of development are commonly mixed with the long cells. All con- 
tain a granular endochrome, the grains of very unequal size. 
Having a half plate to spare, I take the opportunity of figuring 
a Rhizoclonium, sent to me some months ago by Dr. Caspary, 
and found by him near Penzance and Falmouth. It has more 
slender filaments than the ordinary 2. riparium, and occasionally 
appears with longer joints. But the joimts vary extremely in 
different threads, and even in the same thread, so that I find it 
difficult to fix any satisfactory character by which it can be 
known from /. r7parium, in the absence of ascertained specimens 
of that plant. The root-like branches are sometimes much more 
developed than is shown in the figure, which was made from less 
matwre specimens than I afterwards received. 
B. Fig. 1. Web of Rutzoctontum CasparyI, as it appears to the naked eye. 2. 
Filaments from the same :—magnified. 3, 4. Portions of different filaments, 
in one of which the cells have divided, in the other attained their full size. 
a ae 
