Notes on the relations of the yellow limestone (Travertin), of Geilston Bay, with other fluviatile and lacustrine deposits in Tasmania and Australia, together with descriptions of two new fossil Helices.

The freshwater limestone in the neighbourhood of Geilston Bay, Hobart Town, is most interesting to geologists on account of the richness of its included organic remains. It attracted the attention of the illustrious Mr. Darwin during the visit of H.M.S. Beagle to Hobart Town, and was afterwards briefly alluded to by him in his "Journal of Researches." as " A solitary and superficial patch of yellowish limestone, or Travertin, which contains numerous impressions of leaves of trees, together with land shells not now existing. It is not improbable that this one small quarry includes the only remaining record of the vegetation of " A solitary and superficial patch of yellowish limestone, or Travertin, which contains numerous impressions of leaves of trees, together with land shells not now existing. It is not improbable that this one small quarry includes the only remaining record of the vegetation of Van Diemen's Land during one former epoch."