Conglomerates, and Marls of Devonshire. 2b 
Lizard. 2nd: on the north and on the south of this line— in 
Cornwall in the one case, and Normandy and Brittany in the other 
occur two contemporary Lower Silurian groups of rocks, each 
containing fossils exclusively of the mid-European type, and 
characterized by a similar and comparatively low degree of trans- 
mutation. 3rd: the metamorphosis of both the central and 
lateral groups was of pre-Triassic date. 
From these data I incline to the opinion that all the rocks in 
question — the Cornish and Norman quartzites, and the schists of 
Devonshire and Cornwall — are portions of one and the same Lower 
Silurian formation, which in probably late Palaeozoic times under- 
went tmnsformation, the action of which was most intense along 
the Start and Lizard axis, and diminished on both the north and 
and south of it. 
I have dwelt at some length on the pebbles and their sugges- 
tions, from a belief that they afford an excellent example of the 
kind of evidence which geologists have to collect, and that they 
strikingly illustrate the proposition that facts, however unimpor- 
tant in themselves, may have wide-spread and far-reaching con- 
nexions, and may be capable of disclosures of high interest and 
importance. 
The valley in which Budleigh Salterton stands is separated 
from that of the Otter by a small hill which, at its western end, 
mainly consists of sandstone differing in many respects from that 
immediately west of the village. It is yellowish-red, quartzose, 
micaceous, very ferruginous, and contains small angular and 
rounded stones. Owing to the concretionary character and unequal 
distribution of the iron, the sandstone cliff weathers very irregu- 
larly, and assumes botryoidal and other grotesque forms. These 
concretionary masses, in some instances at least, also contain a 
somewhat large amount of carbonate of lime. Towards the east- 
ern extremity of this hill the concretions disappear, the sandstone 
becomes finer, and thin layers of marl are interstratified. 
Immediately east of the Otter the cliff consists of red sand- 
D 
