excessively crowded, much divided, and issuing from all sides of the 
branches. In some varieties the main stem is nearly naked, with a few 
very long virgate branches, much longer than itself, which are clothed with 
slightly compound ramuli, half an inch long; in others the main branches 
and their divisions are so densely crowded, so excessively compound, and 
so frequently quadrifarious, that the whole frond becomes a matted 
ball, so dense that it is difficult to trace its branching. Swbstance tender, 
soon decomposing in fresh water. Colow a beautiful pinky red, which 
becomes rather darker in drying. 
Chrysymenia clavellosa was first described by Mr. Turner, in 
the sixth volume of the ‘ Linnean Transactions’, where a figure 
is given, but was known, as this author informs us, to the excel- 
lent Lightfoot, who proposed to describe it under the specific 
name bestowed upon it by Mr. Turner. It also appears to have 
been im some respects known to Hudson, in whose herbarium 
specimens are preserved. But previously to the publication of 
Mr. Turner’s memo. it was very commonly regarded as a state 
of Chylocladia kaliformis, a plant of a different structure, and 
different ramification. 
By the younger Agardh it is made the type of a new genus, 
to which several exotic species are also referable, distinguished 
from Chylocladia, wnder which Dr. Greville included this group, 
by the absence of internal diaphragms dividmg the branches of 
the frond imto distinct jomts. This character is accompanied 
by some difference in habit, and some minor details of structure, 
and may be admitted as sufficient. But I cannot so readily 
concur with my friend Agardh in removing Chrysymenia from 
the Chondriee to the Coccocarpee. The nature of the fructifi- 
cation, and, as it appears to me, the whole structure of the frond 
are those of Chondriee. In Chrysymenia, indeed, the ceramidia are 
even more perfectly formed than m some species of Chylocladia. 
A specimen of Chondrothamnion confertum, De Not., communi- 
cated by M. Lenormand, is certainly nothing more than a young 
and densely branched individual of the present species, such as 
one commonly finds in spring or early summer. It is a pity 
that the founders of new species are not always sufficiently careful 
to observe the changes which these plants undergo at different 
seasons, and the modifications to which they are subject from 
circumstances attending their production. 
Fig. 1. Ourys SYMENIA CLAVELLOSA :—of the natural size. 2. A small branch, 
bearing capsules. 3. A section of a ramulus, hel i. capsule. 4. A 
ramulus with tetraspores. 5. Tetraspores. 6. A longitudinal section of 
the wall of the frond. 7. ne turers section of the same :—all more or 
less magnified. 
