P. T. Cleve: The Diatoms of Finland. 41 



Lim. 23, 24, Lt. 34, Sinb. Ob. 83. 



A. Follis Ehb. — Donk. B. D. VI, 15. 



Foss. Sa. 88, 89. 



Brebissonia Grun. 



B. Boeckii (W. Sm.) — W. Sm. B. D. XXIV, 223. 



Mb. Ab. 100, Sinf. Nyl. (Dannf.). 



Amphipleura Kiitz. 



A. pellucida (Ehb.) Kiitz. - V. H. XVII, 14, 15. 

 Kus. 72, Ron. 41, Sb. 4, Sinb. Ob. 83. 



Berkeleva Grev. 



B. Dillwynii (Ag.) Grun. — V. H. XVI, 15. 



Sinb. Ob. 83. 

 B. fennica Dannf. 



Sinf. Nyl. (Dannf.). 



Frustulia (Ag.) Rabh. 



(Vanheurckia Breb. 1869). 



F. vulgaris Thw. — V. H. XVII, 6. 



Ab. 36, 49, Sb. 2, 3, 6, 7, 8, 12, 18.' 



F. rhomboides Breb. — V. H. XVII, 1. 



Ab. 36, Sb. 70, Lt. 30, 32, 33, 34, Lim. 20, 21, 25, 27. 



Foss. Sa. 89, Tb. 90. 



Var. crassinervia Breb. — V. H. XVII, 4. 



Ab. 36, Kus. 72, Sb. 2, 4, 17, Ltm. 20, 21, 22, 23, Lt. 29, 



30, 34. 



Var. amphipleuroides Grun. — A. D. Ill, 59. 



Lad. 85, 86, Lim. 21. 



