G. DYNAMENA. 79 



ternate; border entire; height from two to three 

 centimetres ; colour brown. 



On the Thalassiophytes and Polypidoms of Aus- 

 tralasia. 



ROSY. 



5. Dynamena rosacea. Cells tubular; border 

 oblique ; ovaria in the form of a flower with six di- 

 visions, pointed, unequal, and curved. 



European seas. 



BEARDED. 



6. Dynamena harhata. Stem dichotomous ; cells 

 with an oval mouth, the borders of which are garnished 

 with very long cils ; colour whitish ; height about two 

 centimetres. 



On the fucus of Australasia. 



PURSE-SHAPED. 



7. Dynamena bursaria. Stem branching, and ar- 

 ticulated ; cells transparent and carinated. 



European seas. 



DWARF. 



8. Dynamena pumila. Cells carapanulated and 

 gibbous ; inner border long and pointed. 



On the plants and Polypidoms of the Atlantic 

 Ocean. 



OBLIQUE. 



9. Dynamena obliqua. Stem simple and upright; 

 cells oval and a little arched ; the opening so oblique as 

 to appear almost perpendicular ; colour, deep fawn ; 

 height one, or one and a half centimetres. 



On the fucus of Australasia. 





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