INTRODUCTION. 



THE first announcement in connexion with the subject of 1858. 

 " Eozoon" was made by the late Sir Wm. E. Logan, Director- 

 General of the Geological Survey of Canada, in his Report of 

 the year 1858. 



Sir Wm. E. Logan exhibited at the Meeting of the American 1859. 

 Association for the Advancement of Science at Springfield, in 

 August 1859, some Stromatopora-like specimens (noticed in the 

 above Report) from the Grand Calumet and Perth (Canada), 

 which he was " disposed to look upon as fossils "*. 



Report of the Geology of Canada, 1863. Sir W. E. Logan. 1863. 



In this Report (pp. 48, 49) the discovery of specimens, 

 supposed to be fossils, is noticed as having been made "by 

 Mr. J. M 'Mullen, of the Canada Geological Commission, in the 

 crystalline limestone of the Grand Calumet (river Ottawa), 

 which present parallel or apparently concentric layers, com- 

 posed of crystalline pyroxene, while the interstices are filled 

 with crystalline carbonate of lime. Dr. James Wilson, of 

 Perth, found loose masses of limestone near the same place 

 containing similar forms the layers composed of dark green 

 concretionary serpentine, while the interstices are filled with 

 crystalline dolomite. If both are regarded as the results of 

 unaided mineral arrangement, it would seem strange that 

 identical forms should be derived from minerals of such different 



* Quarterly Journal of the Geological Society, vol. xxi. p. 48. 



