26 ASTRID CLEVE, ON RECENT FRESHWATER DIATOMS. 



Sectio: Grunowia. 



A. dentlcula GrRUN. — V. H. LX, 10. 

 Jm. 6, 31. — Rare. 



Sectio: Lanceolatse. 



N. siibtilis var. paleacea Grun. — V. H. LXVIII, 10. 

 Kv. 34. — Rare. 



>\ conimunis Rabh. - V. H. LXIX, 32, Gr. A. D. p. 97. 



Kv. 2(\, Nu. 25, Km. 30. — Somewhat rare. 



N. amphibia var. fossilis Grun. — A. D. p. 98. 

 Kv. 26. — Rare. 



N. frustulum var. perminuta Grun.— A. D. p. 97, V. H. LXVIII, 31. 

 Kv. 34. — Rare. 



N. Hantzschiana Rabh. — Gr. A. D. p. 99, V. H. LXIX, 1. 

 Tr. 38. — Rare. 



Hautzschia Grun. 



H. amphioxys Grun. — V. H. LVI, 1. 



Specimens from Lule Lappmark often have closer striae 

 than is stated in V. H. p. 168. 20 to 21 instead of 16. 



Kv. 1, 34, Jm. 6, Nu. 11, 17, S.-K. 33, Ll. 21, Gl. 43, 

 Gl. D. 44, Km. 10, Tr. 38. — Somewhat frequent. 



Var. elongata Grun. — V. H. LVI, 7, 8. 



Kv. 32. — Rare. 



Denticiila Kutz. 



D. teiiuis Grun. — V. H. XLIX, 22—38. 



Ke. 49. — Rare. 



Epitheinia Bréb. 



E. Zebra (Ehb.) KtJTZ. — V. H. XXXI, 9. 



Kv. 1, 2(), 32. — Ratlier rare. 



Var. longicornis Perag. & Hér. — Auv. III, 14. 



Kv. 26. — Rare. 



