Flora of Koh Chang. 



Contributions to the knowledge of the vegetation in the 



Gulf of Siam. 



By 



Johs. Schmidt. 



Part IV. 



(W. West and Gr. S. West: Fresh Water Chlorophyceae. — Til. Reinbold: Marine 

 Algae (Chlorophyceae, Phaeophyceae, Dictyotales, Rhodophyceae) J ). — M. Gomoilt: 

 Myxophyceae hormogoneae. — Johs. Schmidt: Peridiniales.) 



Fresh Water Chlorophyceae 



by W. West F. L. S. and Prof. G. S. West B. A. — Bradford. 

 (With plate 2-4). 



The following contribution to the flora of the island of Koh 

 Chang has resulted from the examination of a number of collections 

 of freshwater Chlorophycece made during the stay of the Danish 

 Expedition in Siam in 1899 — 1900. The collections were preserved 

 in weak alcohol or formaline and were twenty four in number. 



Very few filamentous Chlorophycece were obtained, the chief of 

 which were four species of Œdogonium and four of Spirogyra, one 

 species of each of these genera being quite new. Two of the col- 

 lections from stagnant water in the jungle were rich in various 

 free-swimming Palmellacece. Some four or five of the collections 

 contained a number of Desmids, many of which have proved to 

 be very interesting. 



The only papers dealing with freshwater Algæ from this region 

 of the world are: — Joshua on „Burmese Desmids" (1886); 



: ) Excl. Corallinaceae hy M. Foslie, published in part II. of the Flora of 

 Koh Chang. 



