their breadth, and of the ramuli gradually shorter; dissepiments dark- 
coloured, cylindrical, or slightly swollen. Zetraspores several in each joint, 
whorled, large, and very prominent. avelle (?) imperfectly organized, 
very irregular in form, issuing in dense clusters from the sides of the 
branches, heaped together, destitute of involucre, containing a fine dark- 
coloured powder, but no regularly formed spores. These favelle (?) are 
produced by the same individuals that contain tetraspores. Substance rigid, 
not closely adhering to paper, unless after long steeping in fresh water. 
Colour, a dark brownish purple or blackish red. 
A more slender plant than C. diaphanum, of a darker colour, 
and with shorter joints, and further distinguished from that 
species by the straight tips of the branches, more prominent 
tetraspores, and above all, by the clustered favel/e, bursting in 
irregular masses from various parts of the stem and branches. 
I confess that I cannot regard these clusters as a normal fructafi- 
cation, nor am I confident that they are even imperfectly formed 
favellee, but rather consider them as erumpent masses of cells, of 
an anomalous character. From true favelle they differ in bemg 
destitute of involucral ramuli, and also in their structure, the 
contents being a fine powder compacted together, without trace 
of spores, such as are usually found in these organs. 
A distorted variety (fig. 2) frequently occurs among normal 
specimens, and this is very generally furnished with the anoma- 
lous fruit. Some specimens are excessively squarrose, with the 
stem and branches regularly bent at short distances, and every 
ramulus divaricating. 
Our figure has been printed in too red an ink. 
Fig. 1. Tuft of Ceramium DesLonecHampr. 2. A distorted frond :—oth of 
the natural size. 3. Portion of the mainstem. 4.+Apex of a branch, with 
imbedded tetraspores. 5. Fertile joints from the same, with tetraspores in 
situ. 6. Apex of a branch, with erumpent favelle (?). 7. Joints from the 
same, with favelle (?) and letraspores :—all more or less magnified. 
