ABSTRAC'JS 647 



tion to the fact that he has not regarded the reference of the Lomma 

 clay to the interglacial river clay (hvitalera) as being certain and 

 bcyoiul dispute. While his reserve in this respect has been correctly 

 stated by other authors, it has not been indicated by Hoist and 

 Moberg. As to the argument made by these gentlemen that a later 

 glacier would have left a heavier moraine resting on the Lomrna clay, 

 it is urged that no such moraines have been left by the ice in a great 

 many other ])laces, where the bed-rock is now in view, nor are such 

 moraines now found over extensive areas in Germany and Denmark, 

 where they are known to have been removed by erosion. The undis- 

 turbed bedding of the Lomma clay does not preclude the possibility 

 of later glaciers overriding it, for underlying soft beds are not always 

 disturbed under such conditions. x\s to the fossils which have been 

 found in this clay [gadus polaris, coscinodiscus, and a number of foram- 

 inifera) the author shows that there is reason to believe that the foram- 

 inifera have been washed out from the subjacent moraine, and hence may 

 belong to an earlier period. Hence these fossils do not indicate any- 

 thing with certainty as to the climate obtaining when the clay was 

 deposited. The age of the Lomma clay must still be left an open 

 question. The author does not regard this circumstance as having 

 any important bearing on the hypothesis of a multiple glacial age as 

 applied to Swedish territory. He inclines to the view that the Lomma 

 clay and the Yoldia clay both belong to a horizon between the drift of 

 the earlier glaciation and the drift of the Baltic ice-sheet, but he 

 leaves the question unsettled as to the climatic conditions indicated 

 by biotic evidence. To distinguish such undetermined deposits as 

 these from other beds which are with certainty known to be inter- 

 glacial, the author applies to the former the name zV//raglacial. 



J. A. U. 



Om strandliniens fdrskjutning vid vara insjoar. (On the Displacement 

 of the Shoreline of our Inland Lakes.) By Gerard de Geer, 

 Sveriges geologiska undersokning, Afhandlingar och uppsatser ; 

 no. 141, pp. 15. 



As regards the displacement of the shoreline, the author divides 

 the lakes of the glaciated country about the Baltic Sea into two 

 classes : one including such lakes as have their outlets in the direction 

 of least elevation, and the other including such as have their outlets in 

 the direction of greatest elevation. Nearly all of the lakes in the high- 



