44 Acta Societatis pro Fauna et Flora fennica, VIII, n. 2. 



rows closely accompanying the prolongations of the central nodule, 

 almost straight, except on the middle, where they are bent. 



PL II, fig. 12. 



This species, of which I have seen only some few specimens 

 occurs at Viando (Sb. 4). It comes probably very near to Coc- 

 coneis baltica Schum. (II, I, 13) but this form differs, according to 

 the figure, published by Schumann, in the end-nodules, which are 

 at a considerable distance from the ends. 



D. ovalis Hilse. 



As D. ovalis I regard all the forms with large, more or less 

 orbicular central nodule, with furrows strongly bent around the 

 nodule, with 13 to 19 rows of puncta in 0,oi m. m. and 13 to 

 20 puncta on 0,oi m. m. No costse are perceptible. The length 

 of the valve is 0,0 3 5 to 0,0 4 3 m. m., the breadth 0,0 2 to 0,0 2 6 

 m. m. As type I consider the fig. 33 in A. S. VII. This form 

 from Hjerken on Dovre (Norway) has 15 rows of puncta and 18 

 puncta in 0,oi m. m. Length 0,0 3 5 m. m. Breadth 0,0 2 m. m. 



The specimens, which I have examined, are the following: 

 from Kantalaks (Lim. 21) with 19 rows of puncta and 20 



puncta in 0,oi m. m. 



Kittila Lappmark (Foss. Lk. 93) 17 14 



Ribatschi (Lt. 31) 13 16 



Ghibina (Lim. 21) 13 13 



(Lim. 23) 13 15 



» Faron, Gottland (CI. M. D. 161) 13 14 



As D. ovalis I regard fig. 34, 35, 36 PL VII in A. S. Atl. 

 Fig 30 seems also to be a form of D. ovalis. 



PL II, fig. 13. 



D. (ovalis var.?) oblongella Nsegeli. — V. H. X, 12. 



Specimens from Kuopio (Sb. 10) are 0,0 2 m. m. in length 

 and 0,00 6 5 m. m. in breadth. Rows of puncta 19 in 0,oi m. m. 



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