2lS the .VllKI'uan ( ieolofflxt. Jaimarv, IHHS 
so far as to isolate the Baltic liasiii from the soa, thus forming a 
lake with a ti'iic frt'sh-watcr fauna. cliara(rteri/.('(l It}' Anci/lus 
fl iniiillUs l/mnp. and after this hike, following' th.e <>eneral unc;- 
qual movement of the re<iion. had l»een partly emptied, then, us 
T have suecei'ded in sliowing. a new sulisidence of land <jecurred, 
\)\ which the outlets cd' the Aii<i//iis lake were changed to sounds, 
jind a marine thouirli scanty fauna miiiiated into the Baltic. The 
deposits formed along the IJaltic. as well as along the western 
coasts of the land during this last sul)sidence. are now partly 
uplifted, less in tiie })eri|)heral and more in the (central partof the 
region. l»nt nowhere more than 20<i-;>(HI fi-et al»ove tlu' sea lev(d. 
They contain a true postglacial fauna, "vvith many southern forms 
whicli are never found in the late glacitil )teds. Hetween the.se 
two marine deposits, peatbogs, liver channels, and other traces 
of erosion are observed in many places in soutliern Sweden, 
showing conclusively tliat at least this part of tln' larul was up- 
lifted lietween tlie tw«» sultsidences. Several of these peat bogs 
and r"iver channels continue beh>w the level of the sea. and such 
signs of sul>mergence are also found at the southern shore of the 
Baltic and around the North sea. 
It is not yet possUdc to say anything with certainty about the 
nature of this last oscillation : but while there seem to be some 
ditticulties in such an explanation, it may be possible that we 
have to deal here only with oscillations in the situation of the 
pivot point of the crust-m<»vement or the isol»ase for zero. Pro- 
fes.sor \. S. Shaler has suggested." that while th«> ci>ntinents are, 
as a rule, rising, and the sea-floors sinking, yet it n)ay happen 
that tlte pivot jxHut. when it lies somewhat at the inside of the 
shore, will take part in the sinking of the sea-bottom, and then it 
will seem as if the continent were sinking, thougli in fact it may 
very well be rising in tin- iuti'rior. If it should turn out that this 
ingenious explanation eoidd be applied to the Scandinavian oscil- 
lations of land, then the whole jdienonn-non wouhl be more easily 
understood: according to this theory, in the center of the region 
after the removal <»f the ice-load a constant rising of the land 
occurred, anil at the same time proltably a sinking of the sur- 
rounding sea-bottom, in which latter movement some portions of 
the land for a time took part during the postglacial subsidence. 
* " Kecent changes of level on the (.'oast of Maine," Mem. Bust. 
.Sue. Nat. IIi<t.. VoL ii. p. :«7. 1874. 
