fo - Éaseuma Aarab 



sinking of the shore line to 132 m. induced terrace building 



at Dunderland, and terraces 132, 130, 128 and 12U m. above 



the present sea level were formed. 



2. The Intermediate Terrace Steps. A Sinking 

 of The Land during The Tajtes-time. 



A continuous sinking of the shore-line to 63 m. at fSkons- 

 eug caused a draining of the whole fjord district both in the 

 isdal and the Dunderlaudsdal above Skonseng. Terraces 

 63 in. above the level of the sea at Skonseng and GO m. in 

 the Kovasdal arc parts of this old bottom. By further sinking 

 a channel was dug through the old deposits. 



In the channel above mentioned not a few occurren- 

 ces of shells have been found. A sandy bluff along the river 

 Langvasaa at Ruffen, 4 km. from Skonseng, contained 14 spe- 

 cies of mollusks, of which o are arctic, 7 boreal and 4 Insi- 

 tanic. The fauna of the lowest stratum 4b' — 47 in. above the 

 level of the sea comprises two species : 

 M a coma cal caria, < hemn. 

 Cyprina isla //di ca, Lin. 

 Macoma calcaria is predominant. The length of the bigg« 

 specimen is only 2U mm. This stratum is also seen on the 

 opposite bank of the river, containing the same species. Strata 

 right above in the bluff contain Mytilus cd/ilis, Lin. (small 

 specimens), Macoma balthica, Lin., Buccinum uftdatum } Liu. 

 aud Balanus porcatus, da < osta Darw., but Cyprina islaudica 

 and Macoma calcaria are also here to be found. A little 

 higher up in a single place the following species were found : 

 Cardium cchi //at /////, Lin. Psammobia ferrøensis } Oheinu. 



Cardium fascial urn, Mont. Cultcllus pcll/icidns, Penn. 



ra alba, Wood. Saxicava arc tica, Lin. 



Ajbra pris ma tica, Mont. Mya tr/u/cata, Lin. 



Of the last species only young ones from 2è - mm. of leugth. 



