G. GALAXAURA. • 117 



ANNULAR. 



4. Galaxaura annnlata. Stem and branches 

 marked with approximate rings ; extremities flat- 

 tening by desiccation; colour yellowish green or 

 inclining to red ; height five or six centimetres. 



Oriental seas. 



WRINKLED. 



5. Galaxaura rugosa. Articulations marked 

 with rings, and slightly wrinkled, cylindrical, and flat- 

 tened at both extremities ; branches sometimes di- 

 verging. 



American seas. 



marginated. 



6. Galaxaura marginata. Branches flattening 

 by desiccation, and turning up at their edges. 



Coasts of the Bahamas. 



STONY. 



7. Galaxaura lapidescens. Articulations slightly 

 marked, cylindrical, and hairy. 



Cape of Good Hope. 



shrubby. 



8. Galaxaura fvuticulosa. Branches cylindrical, 

 contiguous, inclining to yellow, and pointed at the 

 summits. 



Coasts of the Bahamas. 



hard. 



9. Galaxaura indurata. Branches nearly con- 

 tiguous, cylindrical, even, and diverging. 



Coasts of the Bahamas. 



