The author, after mentioning that they were collected by himself from a quarry on the estate of Mr Warner of Ardeer, in the parish of Stevenston and district of Cuninghame, shortly described the quarry, as belonging in its geological position to the carboniferous group; and stated that it is considered the most valuable for white freestone in the west of Scotland. He mentioned the different strata in the order of their occurrence; and stated that coal had been wrought out from beneath it, within the remembrance of the present generation. He said that the fossils are not confined to any one stratum of the sandstone, but are found in them all, wherever the stone is faulty.