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The species of Caulerpa which I have found in the Danish West- 

 Indies creeping on the loose bottom are Caulerpa cupressoides with 



Fig. 2. 



Caulerpa cupressoides (Vahl) 

 (1:4.) F. B. fot. 



Fig. 3. 



Different Algae fixed to the same spot. Udotea fiabellata (Lamx.) J. Ag. 

 Halimeda tridens (Sol.) Lamx. PeniciUus capitata* Lamx. 

 (1:4.) F. B. fot. 



the variety mamillosa, C.pennata with var. mexicana, C.plumaris, 

 C. taxifolia, C. racemosa var. lœtevirens and C. proliféra. Especially 



