Bd.2 • DANSK BOTANISK ARKIV • Nr. 4 



UDGIVET AF DANSK BOTANISK FORENING 



- 1915 = 



A List of Phytoplankton from the Boeton 

 Strait, Celebes 



by «©TA* 



C. H. Ostenfeld. 



A couple of years ago an old school mate of mine, Mr. P. 

 Th. Justesen, who is now a military surgeon (Offic. v. Gezondh. 

 1. kl.) in the Dutch Indian Government, brought me a big lot 

 of drawings of plankton organisms. During his stay at one of the 

 small military places in the Dutch Indies he had used his leisure 

 time to collect plankton in the sea and to examine the samples 

 under the microscope. As he had only very little literature 

 concerning this subject at hand, he was not able to identify the 

 organisms which he found by his microscopical examination, 

 but made very good and careful drawings of all the forms he 

 could distinguish. When he showed me these drawings, he 

 asked me if I could do anything with them. After a prelimi- 

 nary inspection I told him that I would be able to identify a 

 good deal of the protophytes (and some of the protozoa) from the 

 drawings, and that it would be worth while, to publish a list of 

 the organisms as far as they were discernible, as our knowledge 

 of the marine plankton of the Malay Archipelago is rather poor. 

 Of course it was not possible to identify all the drawings, and 

 therefore I asked Dr. Justesen if he did not preserve the samples 

 from which the figures were drawn. He told me that he had 

 not kept the samples separately, but had placed parts of them 

 all into one bottle with formaline, and this he handed me 

 for examination. As all his samples were taken at the same 

 spot, this common sample might have been very useful, but 

 unfortunately the preservation was not good, and the shaking of 

 the bottle had spoiled many of the larger protophytes. Therefore 

 my examination gave only a rather poor result; still, it was of 



