After the Fucacese it is the representatives of the Diciyotaceae and also 

 forms of the Encceliaceae which attain to some size and are found in greater 

 masse sin the West Indies, apart from these most of the forms are small. 

 Upon stones in shallow water brown crusts of Ralfsia expansn are common 

 and upon rocks on the north west coast of St. Croix Aglaozonia canariensis 

 forms large red brown expansions. 



As to the number of species found at the shores of the islands (40 

 species) this is also not great; compared with that found at the shores of 

 the Faeroes (73 species) it is only a little more than half. 



The brown algae occur from low water mark (the tide is nearly wan- 

 ting at the islands) "or a little above, and down to a depth of about 40 

 meters where Zonaria vnriegatn was still found well developed; as mentioned 

 in the introduction to the Chlorophiiceae section I have not been able to 

 dredge in greater depth. 



With regard to the earlier contributors to our knowledge of the algse 

 of the islands I refer to the information given in the Chlorophycese, just as 

 in the case of collectors of algae etc. 



Here I wish only to express my best thanks to the botanists who in 

 oifferent ways have helped me by the working out of the present paper. 



I am much indebted to Mme Weber-van Bosse and Professor C. 

 Sauvageau for having been so kind as to send me original specimens of 

 different species to compare with the mine. 



And especially my thanks are due to Professor P. Kuckuck who by 

 reason his extensive knowledge especially of the Phseosporese has been able 

 to give me much valuable information. 



Finally, I am much obliged to the Direction of the Carlsberg Fund 

 for the grant in aid of the drawings and reproduction. 



