Page:Quarterly Journal of the Geological Society of London, vol. 33.djvu/626

532 igneous production appeared to have covered some extent of the neighbouring district.

A cavern, however, penetrates into the Acropolis hill for 300 or 400 yards, but seems to have been wholly artificial, and was perhaps originally a quarry for building-stone. 

Admiral Spratt's collection consists entirely of plants, the whole of them of undoubted Coal-measure age. The genera and many of the species are precisely those of the Coal-measures of Britain.

Twenty-six specimens occur in the collection:—