8 P. A. ØYEN [NO. 9 



Polytropa lapillus Lin. . . . Length 33 mm. 7 specimens 



Nassa reticulata Lin 1 



Buccinum undatum Lin. . . Length 65 mm. 15 



Buccinum terrce novce Beck 1 



This last-mentioned species, of which only a single fragment 

 was fonnd, is highly interesting, as it proved to belong to the 

 very same type as that which I have described on a former 

 occasion from the clay deposit at Ytterland (P. A. Øyen : Kvartær- 

 Stndier i Trondhjemsfeltet, II (1911), pp. 48 & 49). Of course 

 this fragment has been vvashed into the gravel of this shell-bank 

 from a deposit of true glacial clay once lying at the base of the 

 terrace in question. On the occasion of my visit no remains of 

 this clay conld be detected. The material of the terrace was 

 for the most part derived from the reddish-brown agglomerate 

 of the surrounding rocks. A single fragment of a bone of Bos 

 taums doniesticus was also found to have been washed into 

 this terrace-gravel. 



In Rauer, however, not only is there evidence of the above- 

 mentioned accumulative force of the rolling and washing sea- 

 waves, but phenomena are also observable which give evidence 

 of erosive agents. In some places along the present shore-line 

 some very fine instances of a predominant shore-erosion are to 

 be seen. Plates II and III give illustrations of this phenomenon. 

 A small platform of a breadth of several metres has been formed, 

 however, just at the present sea-level by the erosive action of 

 the waves. We here have a good opportunity of studying in 

 detail many of the phenomena connected with the erosion of 

 sea-shores. Tumbling blocks and stones, washed land-surfaces, 

 channels and pools, each of them represented in a very fine 

 manner, may be seen in action and formation as in perhaps 

 few places along our extended coast. Part of the rocky shore 

 or shelf is over-grown with sea-weeds of various kinds that rise 

 and fall with the heaving waves. 



In climbing along the steep slopes and precipices of the 

 agglomerate rocks here, one is at first astonished to find this 



