6 P. A. ØYEN. M.-N. Kl. 
species that are either in a more prominent way longitudinally folded or 
fitted with very prominent spiral stria. Some fragments of Balanus 
crenatus BRuc. Darw. of the typical variety were also found. 
VII. 
This layer having a thickness of 29 cm. is a true clay deposit of 
very fine-grained material of a bluish-grey colour shading in some places 
into greenish or yellowish. We may, however, trace the fragments 
of Mytilus edulis L. through the whole series. Moreover, a broken 
specimen was also found representing the oblique variety of Macoma sp., 
calcaria CHEMN., rather small and nearly allied to M. torelli SrEENsTR. 
Some fragments of Balanus crenatus Bruc. Darw. were also found 
representing as well the typical form as the more elongated variety. 
VIII. 
This layer has a thickness of 3 cm. It may be designated as a 
deposit of Mytilus-clay mixed with a little sand and gravel. The whole 
layer, however, chiefly consists of fragments and broken specimens of 
Mytilus edulis L. More scattered fragments were also found of the 
following species, Pecten islamdicus Miiz., Arinus sp., flecwosus Monr., 
but somewhat allied in shape to A. sarsii Puit., Saxicava pholadis L. 
juv., and Balanus crenatus Bruc. Darw. 
IX. 
This layer has a thickness of 4 cm. It consists of very fine. clay, 
partly tinged with somewhat chocolate colours. The lower half of it is 
of a greenish-grey colour, and fossil-bearing with some fragments of 
Mytilus edulis L. The upper half of it, however, being of a reddish- 
brown colour proves to be non-fossiliferous. In some places HCI gives 
a slight reaction, even in this upper part, that proves to be very finely 
laminated with only very thin layers that were often prominently folded 
and nicely curled. 
X. 
In the lower part of this division is still retained a little of the 
same fine clay as in the preceding one and tinged with the very same 
greenish or reddish colours thus making the two layers very prominently 
prove to belong to the same transitional series. This division having a 
thickness of 8 cm. is, however, practically to be designated as a Mytilus- 
