14 P. A. ØYEN [No. 12 



The fossil list here tabulated leaves with us not only the 

 interesting facts but also a desire to extend the researches 

 and widening the boundaries for the former occurrence of these 

 arctic species as well inland as upwards in greater height above 

 the present sea-level. ln order to do so we must return to 

 the eastern side of the Christiania Fiord. 



On a former occasion 1 described „Portlandia arctica 

 Gray from the Ra-glacial Period near Fredrikshald" (Christiania 

 Vid.-Selsk. Forh. 1911, nr. 3). In that paper I described the 

 occurrence of Portlandia arctica in a clay deposit situated 

 between the two ranges of morainic ridges constituting the 

 large ra-moraine, of which I gave an account in my paper 

 „Nogle bemerkninger om Ra-perioden i Norge" (Some Remarks 

 on the Ra-period in Norway), 1911, pp. 16 — 21). This clay- 

 deposit with which we meet in the lower part of the valley of 

 Tistedal is to be traced in close connection with the fine ra- 

 moraine in the upper part of the same valley just in the front 

 of and damming up at least partly the Lake of Femsjø. 



In the upper part of the valley just in front of the large 

 ra-moraine there is a series of terraces bearing a strong evidence 

 of intensive cultivation being either of a more rural appear- 

 ance picturesquely shaded by the wooded ra-moraine itself as 

 we may see in Pl. III, Fig. 1 on the right side of the valley, 

 or giving place to a scene of industrious manufacturing activity 

 in the background just at the outlet of the river as we may 

 see in Pl. III, Fig. 2 on the left side of the valley. 



The most picturesque scenery, however, is shown in a view 

 of the inner part of the ra-moraine itself as in Pl. IV with a 

 picture from the central depression in which a corner of the 

 glacial Lake of Femsjø is to be seen at the left side of the pic- 

 ture. And a view, Pl. V, Fig. 1, in the opposite direction 

 gives the picturesque scenery of the surroundings of the Lake 

 of Femsjø which may also be regarded as a typical one of the 

 glacial lakes of the south-eastern part of Norway. In the sur- 

 roundings of the railway-station of Tistedal we meet with a series 

 of terraces rising one above another to a rather considerable 



