12 P. A. ØYEN [No. 3 



Cerithiopsis tubercularis Mont. 



Triforis perversa L. 



Odostomia rissoides Hanl. 



Clathurella linearis Mont. 



Clathurella purpur ea Mont. 



Mangelia costata Don. 



Ditrupa arietina Mull. 



Escharella immersa Flem. (Nordgaard det.) 



In the month of July of the present year, I made an excur- 

 sion to the district of Fredrikshald and the Tistedal accompanied 

 by my little son Tor. When I was occupied in taking a 

 view of some terraces and moraine mounds of the inrier range 

 of moraines outside the boundary of Fredrikshald above men- 

 tioned, he spent his leisure hours in looking for fossils in the 

 clay and gravel' that had been dredged from the bottom of the 

 river and canal inside the moraine just below the sluices a little 

 farther up the valley. After searching for some minutes he 

 signalized his find of Macoma and Saæicava. By our joint 

 continued work at this locality, that is on a level with the 

 sea, we succeeded in picking up and digging out the following 

 species, 



Portlandia arctica Gray, var. siliqua, exactly of they 

 same varietal type with which we are so familiar as to 

 its occurrence in the deposits belonging to the Ra-stage in 

 southern part of Norway. It was for the most part only 

 fragmentary which might possibly have been caused from the 

 dredging. We picked up twelve specimens measuring up to 

 22 mm. in length. 



Macoma calcaria Ghemn. was also found mostly as broken 

 specimens, but also in complete, fine ones measuring up to 30 mm. 

 in length. This species occurred in rather great profusion as 

 we collected no less than 297 specimens. 



Mya truncata L. Of this species only one single broken 

 specimen was found belonging to the very same variety that is 

 so common in the shell-banks of south-eastern Norway from the 



