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Published online by Cambridge University Press: 16 March 2015
Since the Author's former communication to the Society, he has analyzed a portion of a tony fin-ray from the limestone belonging to a fossil fish which has been designated by M. Agassiz, Gyracanthus formosus.
The constituents were found to be,
He has also analyzed a portion of the fossil scales embedded in the limestone. These scales belong to a fossil genus of fish, to which the name of Megaliclithys has been given by M. Agassiz, and which is supposed to approach in character to the Lepisosteus, or Lepidosteus of Agassiz.