- 36 — 



Solitary in a sample from Lem Dan. 



Area: the main species, Europe, America, Java. var. producta: according 

 to de Toni (Syll. p. 786) „cum specie hine et inde". 



Eunotia Ehr. (1837). V. H. Traité p. 298. 



44. E. major (W. Sm.) Rabh. var. octoundnlata Grun. Grun. Banka, 

 tab. 1, fig. 8. 



Lem Dan (two samples). 

 Area: Banca. 



45. E. parallela Ehr. Grun. Banka tab. I, fig. 3 a. 

 Lem Dan. 



forma angustior V. H. Syn. tab. XXXIV, fig. 16. 

 Lem Dan. 



Area: Greenland, Europe, America, Banca. 



46. E. pectinalis (Ktz.) Rabh. var. stricta Rabh. V. H. Syn. tab. 

 XXXIII, fig. 18. 



Lem Dan (3 samples). 



var.? minor (Ktz.) Rabh. V. H. I.e. figs. 20 — 21. 

 Klong Son, Lem Dan (5 samples), 

 forma carta. V. H. I.e. fig. 15. 

 Lem Dan. 



Area: Europe, America. 



var. undulat a (Ralfs) Rabh. in Grun. Banka, p. 4, tab. I, figs. 5 a— e. 

 Lem Dan (11 samples). 



I found forms agreeing with the figures by Grunow quoted above 

 and with W. Sm. Syn. tab. XXXIII, fig. 281 a, but not with V. H. Syn. 

 tab. XXXIII, fig. 17. 



Area: England, Banca. 



47. E. prærupta Ehr. var. bidens Grun. enfr. V. H. Syn. tab. XXXIV, 

 fig. 20. 



Lem Ngob. 



Only one small specimen observed (L. 0,04 mm.), in its shape quite 

 agreeing with the quoted fig. by V. H., but I was not able to see any 

 sculpture on its striæ. 



Area: Type arctic and alpine. 



48. E. robusta Ralfs var. bigibba Öst. var. nov. tab. nost., fig. 13. 



L. 0,06 mm., striæ along the ventral margin 10 in number in 

 0,01 mm., towards the apices closer, finely transversely lineated. 

 Terminal nodi somewhat removed from the apices. 



