8 P. A. ØYEN. M.-N. Kl. 
the layer has been built up in lense-shaped or wedge-like portions. We 
are, however, able to trace this layer quite continuously in a very close 
connection with the top-layers XVI and XVII. 
XVI. 
This layer has only a thickness of 1,5 cm. It is, however, distinctly 
traced as a deposit of crumbling fragments of Mytilus edulis L., only 
mixed with a little clay of a reddish-brown or greenish-grey colour. 
Some scattered fragments of Peeten islandicus Mii. were also found. 
XVII. 
Fine clay of greenish-grey or somewhat reddish-brown colour forms 
a continuous layer of a thickness of 2 cm. This clay is fossil-bearing 
with Mytilus edulis L. and Pecten islandicus Mix. 
XVIII. 
This layer has a thickness of 3,5 cm. It is composed of a grey or 
somewhat brown material of shells and fragments of Mytilus edulis L. 
mixed with gravel and clay in such a quantity as to make the whole 
mass look rather conglutinated. Some fragments of Pecten islandicus 
Muiz. and Trophon clathratus L. were also seen. 
XIX. 
This layer has a thickness of 3,5 cm. It is chiefly composed of a 
rather fine clay of a greenish-grey or reddish-brown colour. Fragments 
of Mytilus edulis are numerous through the whole layer. Fragments of 
Mya truncata L., var. uddevallensis and Buccinum undatum, var. caerulea 
G. O. Sans in different varities were also found among the other shells, 
XX. 
This layer is chiefly composed of crumbling shells and fragments 
of Mytilus edulis L. There is only a trifle of clay and sand admixed, 
and as a rare exception a stone of the size of a wal-nut may be met 
with. The stones are sharp-edged with no traces of having been tumbled 
along a sea-shore. The nearly horisontal strata proved in part to be 
prominently distorted by pressure. This layer has a thickness of 17,5 cm. 
and it is tinged with grev and brownish colours. Some few and scat- 
tered fragments of Pecten islandicus Mir. and Saxicava pholadis L. 
juv. are also seen, as well as fragments of Buccinum undatum, var. 
caerulea G. O. Sans, as well in nearly smooth varieties, as also in varieties 
with prominent spiral striæ. 
