G. LIAGORA. 107 



probably they would not be found in the latitudes 

 bordering on the frozen seas of either pole. 



VARIEGATED. 



1. LlAGORA versicolor. Stem branching or dicho- 

 tomous; extremities simple or bifurcated: colours 

 varying from white to yellow, to red, and to green. 



Var. A. Branches dispersed. 



Var. B. Branches compressed, very flexible, and 

 frequently dichotomous. 



Var. C. Branches constantly dichotomous ; rather 

 stiff, and nearly cylindrical in the state of desiccation. 



Variety A. European seas ; B. coasts of France ; 

 C. Mediterranean. 



CERANOIDOUS. 



2. LlAGORA cerano'ides. Stem dichotomous ; di- 

 chotoma numerous and near to each other ; branches 

 the thickness of a boar's bristle, forked in its ter- 

 mination ; colour whitish ; height from four to five 

 centimetres. 



On the coast of the Island of St. Thomas. 



VESICULAR. 



3. LlAGORA physcio'ides. Stem branching and 

 even ; branches dispersed, few in number, and of a 

 brown colour. 



Mediterranean. 



ORANGE. 



4. LlAGORA auranliaca. Stem branching, and gar- 



