10 P. A. DYEN [No.G 



shell-bank near Auke, a deposit belonging to the Littorina- 

 n i v e a u . 



Mya truncata Lin. Some years ago my f rien d Adolf Hoel, 

 geologist to the Geological Survey of Norway, brought to me a 

 small fragment of Ihis species that he had picked up somewhere 

 in the clay-pits of Bentse. This fragment may possibly have 

 derived from the layer in question. 



Saxicava pholadis Lin. A single fragment was found of 

 a juvenile specimen. 



Panopea norvegia Spengl. forma typica of length 87 mm. 

 The author, in the summer of 1907, succeeded in recoveringa fine 

 specimen of the very same type of this species from the brick- 

 work of Langeso, near Drammen. 



In the slip of clay just at the side of the clay-pit where 

 the layers of the division in question are opened even a single 

 fragment of a gastropoda was found, but the fragment was too 

 imperfect to be accurately determined. 



According to the above description of the fossil-bearing 

 strata at Bentse the only explanation possible seems to be that 

 we have before us a transitional series beginning with depo- 

 sits of the Sveneng intra-glacial stage and being fini- 

 shed with a fossil-bearing deposit of the Pholas- stage. Per- 

 haps a rather thin surfacial covering layer of sand and gravel 

 may belong to the M actra- n i v e a u that rises in a small terrace 

 just behind or north of the terrace of the Pholas -nive&u just 

 above described and probably overlying the deposits of the 

 Pholas -n\yea,u as described by the author on a former occa- 

 sion ("A fossil-bearing deposit of the Mactra-mveau in Chri- 

 stiania"). 



The above description of these transitional series may also 

 further elucidate the complicate faunistic fossil remains that I 

 myself, in the summer of 1904, succeeded in collecting in the 

 clay- slips of the lower brick-work of Bentse just in the terrace- 

 slope of the terrace-deposit of the Brook of Baastad to the east 

 of the Church of Sagene. The following species were found: — 



