P. T. Cleve: The Diatoms of Finland. 57 



E. diodon Ehb. — V. H. XXXIII, 5—7. 



Ab. 36, Nyl. 99, Sb. 2, 9, 15, Lim. 22, Lt. 31 (var. dimi- 

 nuta), 34. 



Foss. Nyl. 87, Sa. 88, 89, Ta. 94. 



E. bidentula W. Sm. — V. H. XXXIV, 28. 



Foss. Sa. 88, 89. 



E. Papilio Ehb. - V. H. XXXIII, 8. 



Lim. 22, 27. 



E. triodon Ehb. - V. H. XXXIII, 9, 10. 



Lim. 21, 25, Lt. 33. 



E. robusta Ralfs. — V. H. XXXIII, 11—13. 



Sb. 5, 17, Lim. 21, Lt. 33, 34. 



Foss. Nyl. 87, Sa. 88, 89, Ta. 94, 95, 97, 98, Tb. 90. 



E. pentaglyphis Grim. — V. H. XXXIV, 33. 



Sb. 17. 



Foss. Sa. 88, 89. 



E. tridentula Ehb. — V. H. XXXIV, 29—31. 



Ab. 39, Sb. 7, 9, Lim. 20, 22, 25, 27, Lt. 29, 35. 



E. Crista Galli CI. n. sp. 



Valve with denticulate dorsal margin, truncate ends. Its 

 lower margin with two slight projections. Stride 13in0,oi m. m. 

 Length 0,0 2 4 m. m. Breadth 0,0 5 m. in. 



PI. Ill, fig. 12. 



Lim. 20. 



Surirella Turpin. 



S. striatula Turp. — V. H. LXXII, 5. 



Sinf. 100. 



Foss. B. 102. 



S. robusta Ehb. — V. H. LXXI, 1, 2. 



Ab. 36, Kus. 72, Lad. ^b, 86. 



Foss. Nyl. 87, Sa. 88, 89, Ta. 94, Tb. 90, Sa. 88. 89, Ob. 

 92, Lk. 104. 



S. splendida Ehb. forma minor. — V. H. LXXII, 4. 



Ab. 36, 47, Sb. 5. 



S. turgida \\\ Sm. — B. D. II, IX. 60. S. ladogensis Weisse 

 f. 20. 



Lad. 85. 86. 



