IO P. A. OYEN. M.-N. KI. 
XXIV. 
This layer has a thickness of 103 cm. It is chiefly composed of 
fragments and crumbling shells of different molluscan forms. There is a 
slight admixture of sand and gravel, but angular stones to the size of 
an egg are not rare. The sharp.edged character of these stones indicates 
that they have been washed directly from the moraine covering the 
ground of the neighbourhood. The most prominent of the organic remains 
is Mytilus edulis L. that occurs in many different varieties in such a 
multitude that it even makes the grey mass appear with a somewhat 
violescent shade. 
In the lower half of the layer Mytilus edulis may be estimated to 
constitute about three fifths of the whole mass and next to this in 
number Balanus crenatus BruG. Darw. takes the first rank. Among the 
other species we are especially to note the occurrence of Lepeta caeca 
Miır., Littorina sp. rudis Mar, and Natica clausa Bron. & Sows. 
Moreover, we find Astarte compressa L.; Tectura virginea Müzr., Punctu- 
rella noachina L., Margarita sp., Gibbula tumida Mowr. Trophon 
clathratus L., and Buccinum sp. Some fragments of Verruca stroemia 
Mu... Darw. were also found. 
In the upper half of the layer Mytilus edulis may be estimated to 
constitute about four fifths of the whole mass, and next to this also here 
Balanus crenatus Bruc. Darw. ranks as the first one. Among the other 
species we are especially to note the occurrence of Littorina sp., litto- 
rea L. juv., Tectura virginea Mürr. and Puncturella noachina L. We 
ought also to pay special attention to the occurrence of the elongated 
variety of Balanus crenatus Bruc. Darw. Moreover, we find Natica 
clausa Bron. & Sows., T'rophon clathratus L., Buccinum undatum, var. 
caerulea G. O. Sans, and Balanus porcatus da Costa, Danw. 
XXV. 
Even in the preceding layer there are some traces of a weathering 
or rather decomposition of the strata as in some places stratification is 
completely obliterated the shell fragments having been partly decomposed 
at the same time as clayey or sandy earth mixed with gravel and stones 
has accumulated in certain portions of a grey or soiled colour; in the 
upper half of it, for instance, such a clod was seen measuring about 
one decimeter and a half in vertical direction and one third of a deci- 
meter in the horizontal one, but the few fragments of shells left, such 
as Anomia ephippium, Mytilus edulis, Saxicava pholadis and Balanus 
crenatus proved the clod to have originated in place. 
