210 BRITISH MARINE ALGA. 
representative of the genus Corynospora, a name which is characteristic 
of the somewhat club-shaped tetraspores of our species, as may be seen 
at Fig. 194, which is an enlarged terminal branch of C. pedicellata: 
The filaments of this plant are from 3in. to 10in. high, very tender and 
_ flaccid, irregularly branched, more or less divided, and set here and there 
with short forked ramuli, which are frequently produced in little rose- 
red tufts at the tips of the branches, the apices of all being invariably 
rounded. The articulations of the stems and branches are many times 
longer than broad, those of the ramuli being gradually shorter as they 
approach the tips. The tetraspores are produced on little stalks, which 
arise from the axils of the branches, or sometimes from the upper shoulder 
of the joints just below the terminal tufted ramuli. Their colour is 
much darker than any other part of the plant, and their form is either 
elliptical, or pear-shaped, or, as the generic name implies, club-shaped. 
Favelle I have never seen, but they are described as being of large size, 
solitary or bi-lobed, and seated on the stems and larger branches. 
This species is a summer annual, and is taken at Brighton and Wey- 
mouth, in Torbay, at Plymouth, and in Whitsand bay. 
I shall now enter on a description of the most interesting group of 
the British Floridiz, the charming little Callithamnie, or, as their 
generic name signifies, ‘“‘ beautiful shrubs;’’ attractive alike by the 
‘beauty and loveliness of their various tints, thé delicacy and simplicity of 
their structure, and the exquisite grace and elegance of their forms. 
This beautiful genus contains nearly a hundred species, some twenty or 
five-and-twenty of which are found on the British shores. Some are 
tolerably robust, and attain a length of 6in. or 8in., while others are 
much smaller, and some are quite microscopic, forming minute velvety 
spots on rocks and on the stems and branches of other alge. Their 
structure is exceedingly simple, all being composed of a more or less 
branched series of cells filled with pink or crimson endochrome, and 
placed end to end. The primary, or conceptacular fruit, is called a 
‘*‘favella ;’’ it is a berry-like mass, usually produced on the branches, 
singly, in pairs, and sometimes in clusters. The secondary, or tetrasporic 
fruit, is generally scattered along the branchlets; in most cases the tetra- 
spores are seated on the inner face of the joints or cells, and attached at 
their bases to the branchlets or ramuli on which they are seated. Many 
of the species are widely distributed ; some are peculiar to the northern 
coasts, others are found only on the southern shores, while some few are 
met with in widely separated localities. The difficulty, not to say 
impossibility, of figuring most of these extremely attenuated plants, so as 
to convey any idea of their appearance in the living state, at least so 
far as to be of the slightest service in assisting inexperienced collectors 
he identifying species, compels me to have recourse to drawings of 
magnified portions of most of the plants [ shall describe, and to impress 
once more on my readers the absolute necessity for the employment of the 
microscope, or the strongest lens obtainable, otherwise the distinction 
