xii Transactions of the Boyal Society of South Africa. 
anticlinical structure of the range was clear, for at many places in it 
the Witteberg beds were seen to dip under the Dwyka on either side. 
The masses of quartzite in the Dwyka described by Dr. Sandberg appeared 
to be parts of that formation, i.e., originally sandy sediments with few or 
no pebbles, formed at the same time as part of the tillite. Similar 
quartzites in the Dwyka had been described from several localities in 
the south of the Colony. An examination of Sand Eiver Valley showed 
not only that it was extremely unlikely that a mass of Witteberg beds 
underlay the surface, for those beds were not known to form valleys like 
that of Sand Eiver, but that where outcrops of rock in sitil occurred, they 
belonged to the Bcca Series. He had come to the conclusion that it was 
unnecessary to assume the presence of a great overturned fold to account 
for the appearances at Tygerberg, and that the earlier observers were 
quite justified in ascribing an anticlinical structure to the range. 
