﻿SUMMARY OF THE CONTENTS. 705 



Thus compared with older deposits we see a great difference. 

 Of arctic species are left almost exclusively sucli as have a wide 

 Southern distribution, and these occur in southern varieties; and 

 on the othcr hand, a great nuniber of southern (lusitanic) forms 

 have immigrated. It is probable, that all the arctic forms of 

 the upper tapes-banks have existed in the fjord before. The 

 number of boreal forms is 89, (comprising crania anomala and 

 montacuta Vørimjii) i. e. 47 species more than in the upper 

 ostræa-banks. The number of lusitanic forms is 93 (comprising 

 isocardia cor of the contemporaneous isocardia clay), i. e, 05 

 species more than in the upper ostræa-banks. The number of 

 boreal forms is thus double, that of lusitanic forms treble that 

 in the upper ostræa-banks. There appears to be no doubt that 

 this fact indicates an important amelioration of the dimate from 

 the beginning of postglacial time; it is very probable that the 

 climate during the deposition of the upper tapes-banks has been 

 still milder than it is at present. 



Pp, 446 — 457. 3. Shell-banks, Corresponding to the Upper 



Tapes-banks, in Scandinavia (apart from the 



Kristiania Region). 



Corresponding tapes-banks are known in Bohuslan in Swe- 

 den (pp. 446—448) and along the shorcs of the Kattegat on the 

 north coasts of the Danish islands, and in Jutland (p. 448). 



Along the Norwegian coast west of the Kristiania Fjord 

 also, a number of tapes-banks are known (pj). 448—457), 



Special interest attaches to the discovery of shell-banks be- 

 longing to this group on Jæderen (by Mr. Øyen) at Kregemyr, 

 not far from Stavanger, in connection with refuse-heaps from 

 the older neolithic age (discovered by Mr. T. Helliesen, at 

 Kværnevik). These refuse-heaps nearly correspond with the 

 well-known Danish „kitchen-middens", and are situated at a level 

 of 18 m. above the sea. The corresponding shore-line from the 

 time of their formation was determined (by Øyen) at 12 — 15 m. 

 above the sea. It is thereby proved that in Norway also, a people 



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