P. T. Cleve: The Diatoms of Finland. 49 



Striae 14 in 0,oi m. m., reaching the raphe, almost parallel, near 

 the apex sligthly radiant, indistinctly punctate. 



This species agrees in the outline with G. apicatum Ehb. M. 

 G. IX, I, 41, but it is also very probable that Ehrenberg, as in 

 many other cases, includes under this name some different forms, 

 for instance of G. acuminatum. It seems also probable that G. 

 apicatum may be the same as G. cristatum W. Sm. (BD. XXVIII, 

 239), but the figure is too small and indistinct for admitting iden- 

 tification. The same is also the case with the sketch published 

 by Heiberg in Gonsp. D. D. V, 17. From G. Augur G. apicatum 

 is distinct by its much smaller size, finer and more close striae. 



PI. Ill, "fig. 20, 21. 



Ab. 38, 48, Kon. 40. 



G. subtile Ehb. — V. H. XXIII, 13, 14. 



Foss. Sa. 89. 



G. sphserophorum Ehb. — V. H. XXIII, 30. 



Al. 57 (rare). 



G. tenellum Kiitz. — V. H. XXIV, 22—25. 



Ab. 50. 



G. subclavatum Gran. — V. H. XXIII, 38; XXIV, 1. 



Ab. 37, 49, Sb. 1, 2, 5, 7, 12 (abundant), Lt. 35. 



G. montanum Schum. — V. H. XXI 1 1. 32—37. 



Lad. 86, Sb. 8 (abundant), 13, Lim. 21, 23. 



Fogs. Ta. 07. 



G. Mustela Ehb. — V. H. XXIV, 4—6. 



Ah. 36, 44, Sb. 6, 11, 19, Lim. 2G, Sinb. Ob. 83. 



Foss. Ta. 96. 



G. Vibrio Ehb. — V. H. XXIV 26, 27. 



Ab. 36. 



Foss. Nyl. 87, Ta. 97. 



G. Turris Ehb. - V. H. XXIII, 31. 



Foss. Sa. 89, Ta. 97. 



G. intricatum Kiitz. — V. H. XXIV, 28—36. 



Ab. 36, 38, 45, 48, Kon. 40. Sb. 4. Lim. 23, 24, 2G. 



Toss. Sa. 88, Ta. 98. 



G. gracile Ehb. — V. II. XXIV. 12-20, 



