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coasts of which are mostly rocks, we should probably meet most 

 of these species, but in addition to these a great many succulent 

 plants, common on these rocky islands, especially Agave- and 

 Cactus-si>ec\es. 



Fig. 89. Rocky coast on the east side of Magens Bay, St. Thomas. Below 



to the left Sesuviunt portulacastrum, in the middle Opuntia and also 



Cereus and Agave. (F. B. phot.) 



On the east side of Magens Bay on the north side of St. Thomas 

 the rocky coast consists partly of stationary rocks partly of larger 

 and smaller blocks of stones, as the above picture shows (fig. 39). 

 Nearest the sea bluish-green algae were growing on these rocks, and 

 now and then in dark crevices Enteromorpha- and Bostrychia-s]^ecies 



