P. T. Cleve: The Diatoms of Finland. 63 



Al. 56, Ab. 50, Kon. 43, Sb. 5, 11, 18, 19, Lt. 28. 



S. delicatissima W. Sm. — V. H. XXXIX, 6—10. 



Sb. 7. 



S. amphicephala Kiitz. — V. H. XXXIX, 14, 15. 



Sb. 7. 



S. familiaris Kiitz. — V. H. XL, 15. 



Sb. 13. 



S. crotonensis Edw. — C. M. D. n:o 128. 



Ab. 74, Sb. 71. 



S. affinis Kiitz. — V. H. XLI, 9, 15—19. 



Sinf. Nyl. 100, Sinb. Ob. 83 (stria? 16 in 0,o l m. m.). 



Var. tabulata Sinf. Nyl. (Dannf.). 



Var. parva Sinf. Nyl. (Dannf.). 



Asterionella Hassal. 



A formosa Hassal. — V. H. LI, 19—21. 



Ab. 74, Sat. 75, Lad. 62, 63, 64, 65, 66, 67, 68, Sb. 69, 70, 71. 



Fragilaria Lyngb. 



F. virescens Rails. — V. H. XIV, 1—3. 



Al. 58 (var. exigua), Ab. 39, Sb. 2, 8, 9, Lt. 29, 33, 35. 



Foss. Tb. 90, Lk. 104. 



F. undata W. Sm. — V. H. XLIV, 9. 



Ab. 36, 46, Lim. 25, Lt. 30. 



Foss. Sa. 88, Ta. 97, Tb. 90. 



F. capucina Desm. — V. H. XLV, 2. 



Ab. 44, 74(?), Lad. 62(9), 64(?), 6o(?), Kon. 40, Sb. 70. 



The ? signifies that I have not seen the valvular face of the 

 frustule, for which reason these forms may possibly be the follo- 

 wing variety. 



Var. mesolepta Rabh. — V. II. XLV, 3. 



Al. 57, Ab. 47, Kon. 40, 41, 43, Sb. 5, 11, IS. 



F. construens Ehb. — V. II. XLV, 26. 



Al. 57, Ab. 46, 47, Kon. 40, Sb. 6. 



Foss. Lk. 104. 



F. Harrisonii (W. Sm.) Grua — V. If. XLV, 28. 



