found elsewhere in Cornwall: we searched in vain for the octahedral ore of titanium (anatase) which from the character of the slate, and its accompanying minerals, we thought ourselves not unlikely to discover. The rock has not been ascertained as yet to contain any metalliferous veins: we observed one minute bunch of yellow copper ore imbedded in the slate itself. The strata are at this spot much freer from curvatures and other contorsions than they are along the coast to the eastward of it.
The slate of Snowdon bears the impression of shells resembling those contained in the present specimen. At Tintagel they are certainly of very rare occurrence: though we spent some hours in the quarry, we could not find any further traces of them.
Figures of the shells from Tintagel will be found at Plate 25. f. 1. The lower figure represents a specimen of fossil shells from Snowdon, presented to the Geological Society by the Woodwardian Professor.
