G, CORALLINA. 
131 
HAIRY. 
15. Corallina pilifera. Articulations of the stem 
and principal branches nearly globular, covered with 
dispersed and hairy filaments, branching from their ori- 
gin, articulated, cylindrical, and sometimes half a centi- 
metre long ; ovaria pyriform, sometimes with filaments 
like the articulations of the stems ; colour white, with 
a slight shade of green or violet ; height from four to 
five centimetres. 
Australasia. 
SIMPLE. 
16. Corallina simplex . Very slightly branching ; 
articulations cylindrical at the base, compressing al- 
most immediately, unequal in size, and of various 
forms ; straw-colour ; from four to five centimetres in 
height. — Plate 10. fig. 4. 
American seas. 
CALVADOS. 
17. Corallina Calvadosii . Articulations irregu- 
larly compressed, sometimes zoned like the Ulva pa- 
vonia ; those of the stem and the lower branches more 
broad than long, nearly triangular, and marked with 
two or three furrows ; those at the extremities nearly 
cylindrical ; height three or four centimetres. 
Particularly observed on the rocks of Calvados. 
PALMATED. 
18. Corallina palmata . Articulations com- 
pressed, convex and cuneiform; the upper ones 
large and lobed. 
American seas. 
