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ties clavifera, uvifera and Chemnitzia. It creeps on the rocks, sticks 

 to them by means of its abundantly ramified „roots" between which 

 sand is often gathered and forms low, compact light-green tufts 

 (fig. 1); it is able to grow on rather exposed localities. Furthermore 

 may be found here: Dictyosphœria favulosa which forms big, rather- 

 hard, light green clumps, Cladophora species etc. and in more 

 protected places Bryopsis species, for instance plumosa and pennata, 

 Codium tomentosum etc. Along the shores Sargassum species for 

 instance vulgare and bacciferum and Turbinaria vulgare form more 

 or less extensive associations corresponding to our formation of 

 Fucaceæ; a common ephiphyte in this association is Haliseris 



i 



Fig. 1. 



Caulerfia racemosa Forsk, 

 creeping on a piece of coral. (Near half size.) F. B. fot. 



delicatula. Together with these species Padina Pavonia is also 

 very frequently found in shallow water near the shore. 



Furthermore large bushes of Dictyota sp. are often to be seen, 

 for instance dentata, Bartayresiana and fasciola together with 

 Hydroclathrus cancellatus, Colpomenia sinuosa and many others. 

 Of Florideæ occur in these localities Bryothamnion trianguläre, 

 Laurencia sp. , Centroceras clavulatum , Ceramium nitens , Hypnea 

 musciformis, species of Liagora , Amphiroa and Corallina (Jania) 

 and many others. It is however especially the vegetation in the 

 lagoons and the more quiet sheets of water behind the coralreefs 

 which I particularly have had an opportunity of examining. The 



4* 



