P. T. Cleve: The Diatoms of Finland. 61 



N. intermedia Hantzsch: — V. H. LXIX, 10. 

 Lim. 23. 



N. palea (Kiitz.) W. Sm. — V. H. LXIX, 226. 

 Al. 59, Ab. 37, 49, Kon. 41, 43, Sb. 11, 13, 19 (var. tenui- 

 ostris). 



N. Kiitzingiana Hilse. 



Sinf. Nyl. (Dannf.). 



Var. exilis. Sinf. Nyl. (Dannf.). 



N. fonticola Grim. — V. H. LXIX, 15—19. 



Sb. 11. 



N. communis Rabh. — V. H. XXI, 32—35. 



Sb. 6. 



N, amphibia Grun. — V. H. LXVIII, 15-20. 



Kon. 41, Sinb. Ob. 83. 



Foss. Ob. 91. 



N. Frustulum (Kiitz.) Grun. — V. H. LXVIII, 27—31. 



Kon. 41, Lim. 21. 



N. Hantzschiana Rabh. — V. H. LXIX, I, 2. 



Sb. 13. 



Sectio: Nitzschiella. 



N. acicularis var. closteroides Grim. 

 Sinf. Nyl. (Dannf.). 



Haiitzsehia Grim. 



H. virgata (Roper) Grim. — V. H. LVI, 12—13. 



Sinf. Nyl. 100. 



H. elongata (Hantzsch) Grun. — V. H. LVI, 7—8. 



Ab. 36, Sb. 2, 10, K : . 



Foss. Nyl. 87; Sa. 88, 89; Ta. 97; Tb. 90; Ob. 92, Lk. 93, 104. 



H. amphioxys Grun. — V. H. LVI, 1—4. 



Al. 59, Sb. 7, 12, 13, 18, Lt. 29. 



Foss. Ta. 94, 95, 98. 



Denticnla Kiitz. 



D. tenuis Kiitz. — V. II. XLIX, 31—32, 35—37. 

 Sinb. Ob. 83, Lt. 28, Lim. 23, 24. 



