35. Hustedt, F., Die Kieselalgen Deutschlands, Osterreichs 

 und der Schweiz , Rabenhorst's Kryptogammen-flora, Parts 1 

 and 2, 1927-33. 



36. Cleve, P.T., "The Plankton of the North Sea, the English 

 Channel, and the Skagerak in 1898," Svenska Vetenskopsakad - 

 emien Akademie Handlingar , vol. 32, No. 8, 1900. 



37. Gran, H.H., Diatomeen in Nordisches Plankto n (Brandt, K. 

 und C. Apstein), Lief. 3, 19, pp. 1-146, 1905. ~~ 



38. O'Meara, E., "Report on the Irish Diatomaceae," Royal 

 Irish Acadamy Procedure (ser. 2), vol. 2, Science, pp. 235-425, 

 1875-77. 



39. Comber, T., "On the Occurrence of Endocysts in the 

 Genus Thalassiosira," Transactions Royal Microscopical 

 Society , pp. 489-91, 1896. 



40. Jorgensen, E., "Protisplankton. The Protisplankton 

 and the Diatoms in Bottom Samples. Hydrographical and 

 Biological Investigations in Norwegian Fjords," Bergens 

 Museum Skrifter , vol. 7, pp. 49-148, 1905. 



41. Cleve, P.T., "Plankton Under sokningar, Cilioflagellates 

 og Diatomaceer," Bihang Svenska, Vetenskopsakademien 

 Akademie Handlingar , vol. 20, No. 2, 1894. 



42. Woodcock, A.H., "A Theory of Surface Water Motion 

 Deduced from the Wind-Induced Motion of the 'Physalia,' 

 Journal of Marine Research, vol. 5, No. 3, pp. 196-205, 1944. 



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