1913] A FOSSIL-BEARING DEPOSIT 11 



Balanus crenatus Brug. Darw. vas only found to be re- 

 presented in a single broken specimen. 



Some clay concretions were also found, either of a more 

 cylindrical form or of a more irregular shape. They either had 

 a yellowish or a rusty-brown colour. 



Some vegetable remains were also found as casts or im- 

 pressions of leaves of the following species : — 



Zostera marina Lin. A very fine east of forma typica, 

 and of mean size. 



Potamogeton alpinus Balb. or Potamogeton ruféscens 

 Schrad. (Blytt: Haandbog i Norges flora ved Ove Dahl, 1906, 

 p. 46). A east or impression can not easily be mistaken to re- 

 present this species. 



Equisetum hiemale Lin. A very fine and well-formed east 

 of a stem-joint and the adjoining parts of the stalk itself was 

 found. The coarse and longitudinal striation is very characteri- 

 stic in this species and proved to be rather well developed and 

 excellentty preserved. 



Betula odorata Bechst. A well preserved impression of a 

 rather large leaf was found. 



Dry as odopetala Lin. A somewhat imperfect impression 

 of a leaf was found the nervature and other characteristics of 

 which, howewer, could not be mistaken to represent this species. 



In the very same place was also found a east that seemed 

 to represent part of an insect specimen; Mr. Schoyen, the state 

 entomologist, was not, however, able to idenfy the species. 



This fossil-bearing deposit, or we ought rather to say, these 

 fossil-bearing deposits, is situated in a well pronounced terrace 

 rising about eight metres above a rather even and widely ex- 

 panded terrasse-plane extending up to the very foot or base of it. 

 As my mapping of the postglacial deposits in the Valley of Aker 

 has proved this foreground terrace belongs to the Pholas- 

 niveau. No direct excavations or borings have been set forth 

 in order to ascertain whether this terrace is directly underlying 

 the above-mentioned fossil-bearing eight-metres terrace or not. 



