— 38 — 



Divergentes Cl. 1. c. p. 77. 



25. P. divergentissima Grun. V. H. Syn. tab. VI, fig. 32. 

 Solitary in two samples from Lem Dan. 



Area: Spitzbergen, Greenland, N.Europe, Canada, New Zealand. According 

 to Cleve (1. c. p. 77) an arctic and alpine species. 



26. P. divergens W. Sm. var. elliptica Grun. Grun., Fz. Jos. Land 

 tab. I, fig. 19. 



Solitary in a sample from Lem Dan. 



Area: Franz Joseph-Land, Greenland, Europe, America, Africa, Australia. 



Tabellarieæ Gl. II, p. 81. 



27. P. stanroptera Grun. Donk., Brit. Diat. tab. XII, fig. 3. 

 Klong Prao, Klong Son, Koh Samit, Lem Dan. (6 samples). 



var. interrupta Gl. V. H. Syn. tab. VI, figs. 6 — 7. 

 Lem Dan. 



Area: the main species: Europe, America, Australia, var. interrupta: 

 Franz Josef-Land, Europe, America, New Zealand, Hawaii. 



28. P. stomatophora Grun. var. ornat a A. Gl. A. Gl. Lule Lappm. 

 fig. 3. 



Solitary in two samples from Lern Dan and Koh Samit. 



The present form is somewhat larger than that figured by A. Cleve. 



Area: Lule Lappmark. 



Brevistriatœ Gl. 1. c. p. 85. 



29. P. brevicostata Gl. A. S. Atl. tab. XLIII, figs. 26-27. 

 Lem Dan, Koh Samit. 



Area: Europe, Bengal. 



30. P. parva (Ehr.) Grun. A. S. Atl. tab. XLIII, fig. 21. 

 Lem Ngob. 



Area: Europe, America, Java, Australia, New Zealand. 



Complexée Gl. Le. p. 91. 



31. P. viridis Nitzsch. A. S. Atl. tab. XLII, fig. 14. 

 Lem Dan (4 samples). 



var. intermedia Gl. A. S. Atl. tab. XLII, fig. 9. 

 Lem Dan. 



Area: the main species ubiquitous, var. intermedia: Europe, Congo, Java, 

 Australia. 



Botanisk Tidsskrift. 25. Bind. 



3 



