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CLASS II. — ORDER II. 
dilations thick and cuneiform, those of the bifurca- 
tions being the largest, the terminals three-pointed or 
oval. 
Mediterranean. 
Nota . It is not improbable that the Nodularia and 
the Loricata may be mere varieties of the Officinalis. 
ELONGATED. 
4. Coral LINA elongata . Articulations of the base 
cuneiform, those of the branches cylindrical, and 
the terminating ones obtuse. 
Coasts of Calvados and English Channel. 
POLYCHOTOMOUS. 
5. Corallina polychotoma. Articulations nearly 
triangular, sometimes undulated or else concave, flat 
at the extremities, cylindrical in the stem, compressed 
in the intermediate parts, frequently producing more 
than three branches, which issue from the sides. 
Height three or four centimetres. 
Found among the Thalassiophytes of the Bay of 
Cadiz, and, from the various forms of its articulations, 
is one of the most singular of the genus. 
LOBED. 
6. x Coralljna lobata . Articulations of the stems 
and their branches cylindrical at the base, five or six 
times larger, and compressed, or nearly flat, at the ex- 
tremity, which is horizontally truncated, and marked 
with three or four lobes of no regular depth ; the ar- 
ticulations of the summits are of a leafy form ; colour 
