1913] SOME CLAY DEPOSITS IN THE S.-E. PART OF NORWAY 13 



Macoma calcaria Ghemn. 



Saxicava arctica L. 



Siphonodentalium vitreum M. Sårs. 



Glose by, in the very next neighbourhood of this last men- 

 tioned locality a ridge of gravel and boulders was seen rising 

 about a couple of metres. 



Meanwhile, I had also described similar deposits with arc- 

 tic shells from the western side of the Christiania-Fiord, for in- 

 stance, near Berven, 35 m. a. s. (Christiania Vid.-Selsk. Forh. 1906, 

 nr. 1, pp. 3—4, 34—35), and near Horten, 33,3 m.a.s. (1. c. pp. 

 35—36) in which both places Portlandia arctica Gray wasfound. 



No one of the above mentioned occurrences of arctic shells, 

 all of them situated outside the large ra-moraine and only rising 

 to between fifty and sixty metres above sea-level, are of such 

 a great interest as the following one which I described in 1908 

 after having discovered it in 1904 (Christiania Vid.-Selsk. Skr. I. 

 Math.-Naturvid. Kl. 1908, nr. 2, pp. 29—36). This clay-depo- 

 sit was situated inside the large ra-moraine just at the top of the 

 ridge of Braarudaas near Horten at a place in which a water- 

 réservoir was under construction on behalf of the town itself. 

 The fossils themselves were collected in primary situation no 

 less than 87.4 m. a. s., but the very same deposit of clay and 

 gravel was still rising some few metres to the height of 92,4 

 m. a. s. The casts of fossils found ind this clay were rather 

 numerous comprising the following species : — 



Nucula tennis Mont. 



Leda pernula Mull. 



Portlandia arctica Gray var. siliqua, measuring 



Length 20 mm. Height 13 mm. Relative index 0.650. 



Portlandia intermedia M. Sårs. 



Portlandia lenticula Møll. 



Yoldia hyperborea Lov. 



Macoma calcaria Ghemn. 



Lepeta caeca Møll. 



Lunatia groenlandica Beck. 



Sipho togatus Mørch. 



