INTRODUCTION 



JVly studies on the marine algae of the Danish West Indies 

 are based upon the collections I have gathered there during 

 my three visits to the islands in 1892 (February — March), 1895 

 —96 (December— January) and 1905 — 06 (end of December to 

 beginning of April). 



The reason for my not being able to work up my collections 

 before now is, that my examination of the algal vegetation of 

 the Faeroes was begun in 1895 and it was not until I had finished 

 this that I could devote myself to the study of the West Indian 

 Algse. 



In this first part comprising the Chlorophycese I give a survey 

 over the species, which I have so far found in my gatherings. 



In several papers published earlier I have already dealt with 

 some groups of the Chlorophycese. These papers are: 



Contributions a la connaissance du genre Siphonocladus Schniitz 

 (Oversigt over det kgl. danske Videnskab. Selskabs Forhandl., 1905, Nr. 3). 



An ecological and systematic account of the Caulerpas of the Danish 

 West Indies (Kgl. Danske Videnskabernes Selskabs Skrifter, 7. Rsekke, 

 naturv. og mathem. Afd. IV. 5, 1907). 



The species of Avrainvilleas hitherto found on the shores of the Danish 

 West Indies (Videnskab. Meddelelser fra den naturh. Foren. i Kobenhavn, 1908). 



The Dasycladaceai of the Danish West Indies. (Botanisk Tidsskrift, 

 28. Bind, Kobenhavn, 1908). 



Some Chlorophyceaj from the Danish West Indies, I. (Botanisk Tids- 

 skrift, 31. Bind, Kobenhavn 1911). 



Some Chlorophycese from the Danish West Indies, II. (Botanisk Tids- 

 skrift, 32. Bind, Kobenhavn 1912). 



1 



\ (s,"^ ^^ 



