Perîdiniales 



by Johs. Schmidt. 



The following list of marine Peridiniales is due to the exami- 

 nation of a number of plankton samples collected by the Danish 

 Expedition in the inner part of the Gulf of Siam. The samples 

 which are 10 in number, were obtained from the surface of the Sea 

 by means of fine silk-nets and were preserved in formaline (4 %) 1 ). 



This is a list of the samples collected: 



Nr. 



1. 



25 /l2 



1899. 



Strait between Lem Ngob and Koh Chan 



» 



2. 



9 /l 



1900. 



Between Koh Kahdat and Koh Kut. 



V 



3. 



"/l 



1900. 



S. of Koh Chang. 



V 



4. 



16 /l 



1900. 



W. of Koh Chang, N. of Koh Savan. 



V 



5. 



17 /l 



1900. 



W. of Koh Chang, S. of Koh Savan. 



V 



6. 



18 /l 



1900. 



S. of Koh Chang. 



» 



7. 



27 /l 



1900. 



North End of Koh Kut. 





8. 



28 /l 



1900. 



7 miles S. of Koh Kut. 





9. 



31/, 



1900. 



18 miles W. of Koh Chang 2 ). 



» 



10. 



21 /3 



1900. 



1—2 miles S. of Koh Kram. 





In 



the following 



y list of species recorded 







c 



means 



predominant 







4- 



Ti 



common 







r 





rare 









» 



very rare (only a few specimens seen). 



1 ) The Diatoms contained in the Plankton-samples will be published later on. 



2 ) This sample seems to consist exclusively of Triclwdesmium Hildebrandtii 

 Gomont. 



