ON 



A POST-TERTIARY SAND 



CONTAINING 



DIATOMACEOUS EXUVIjE 



GLENSHIRA, NEAR INVERARY. 



BY 



WILLIAM GREGORY, M.D., F.R.S.E. 



PROFESSOR OF CHEMISTRY. 



Ileprintcb from % " ^uarttrlg lottrnal of gftitrostogital Srinux." 

 With a Plate, containing Figures of several New Species. 





LONDON: 



SAMUEL HIGHLEY, 32 FLEET STREET. 



1854. 



