54 ARKIV FÖR BOTANIK. BAND l-t. N:0 9. 



the case with Ep. Hyndmannii, I think I have found a po- 

 sitive argument against the quoted hypothesis in the sporangial 

 frustule, drawn in fig. 81. It occurred in a sample from 

 Hindersmossen (Ab.) in the company of Epith. turgida, Hynd- 

 mannii a. o. species of the same genus. Length 170 \i; outline 

 irregular, ends somewhat rostrate. 



Eimotia Ehb. 



Eunotia Arcus Ehb. var. plicata Br. & Hérib. — D. 

 d'Auvergne Tab. 5, f. 6, 7. 



Foss.: Kk. Knjäsha, rare. 



Distr. {fresh w.): Puy de Dome (fossil). 



One specimen of this variety, hitherto known only from 

 France, was found together with a few other fresh-water 

 diatoms intermingled in a marine sample from Knjäsha. 

 There were no other species of the genus Eunotia present 

 in the sample. 



Eunotia flexuosa Kütz. — V. H. Syn. Tab. 35, f. 7—11 

 (different varieties). 



Foss.: Kk. Knjäsha. 



Distr. {fresh w.): Europe. 



Only one specimen, 180 [j. in length, 7 [J. in breadth, with 

 8 striae in 10 [x. Ends dilated, damaged, as not to allow an 

 exact determination of the variety. 



Eunotia Clevei Grun. — Cleve, D. of Finl. Tab. 3, f. 

 13_16. — Icon. nost. PI. 3, f. 64. 



Of this well-known species, living in the Ladoga, but not 

 known recent from Sweden, I have found in a sample from 

 Ab., Hindersmossen, a very large specimen, that has not the 

 typical outline of Eunotia Clevei. The valve is slightly gibb- 

 ous on the ventral side and gradually attenuated towards 

 the broad, obtuse to subtruncate ends. Length 335 [j., breadth 

 in the middle 43 [i, at the ends 22 [x. This form is most 

 probably a sporangial cellule of Eunotia Clevei, whose ordin- 

 ary length is quoted by Cleve (1. c. p. 55) to be 110—180 [J.. 

 I have found the fossil species to be most frequently about 

 140 tJi in length, though soaie specimens reach until 300 t»-. 



