6 P. A. ØYEN [No. 3 



It is, however, very probable that some part of this fauna 

 also corresponds with the younger or inner range of moraines 

 belonging to the Ra-stage. 



II. 



In the same place we meet with a group of fossils of quite 

 another character. It is, however, highly interesting to note that no 

 trace of any catastrophism is to be observed. The fossils them- 

 selves prove that a rather slow and continuous transition has 

 tåken place. We here find such fossils as surely indicate 

 the division of strata named after Horten, and which in that 

 place has been proved to be in immediate sequence of the strata 

 of the Ra-stage 1 . Besides Portlandia arctica Gray, that may 

 in part have survived from the preceding period, as perhaps also 

 Lepeta caeca Mull., the following species were found, 



Portlandia lenticula Moll. Length 4 mm. 



Yoldia hyperborea Lov. Mean size. 



Moreover, we also meet here with representatives of the 

 following division named after Eidsberg, viz. such forms as, 



Anomia ephippium L. var. squamula G. 0. Sårs. 



Area glacialis Gray. Of this species seven broken speci- 

 mens were found belonging to the rather large and conspicuously 

 rhomboidal variety so characteristic of this second division of 

 the Søreng-period 2 . 



Abra longicallis Sc. 



We might here also mention such forms as Antalls strio- 

 lata Stimps. and Schizasler fragilis Dub. & Kor., but it is 

 more probable that these species ought rather to be regarded as 

 leading fossils of the following series. At least, we find the 

 whole of the Søreng-period, preceding the Aas-stage, to be 

 represented in the list of fossils. 



1 P. A. Øyen: Kvartær-studier i den sydøstlige del af vort land, 1908, 

 pp. 32-36. 



2 P. A. Øyen: Kvartær-studier i den sydøstlige del af vor-t land, 1908, 

 pp. 24-36. 



