252 Dawson and Carpenter on Eozoon Canadense, 
ously a process by which the structure of any fossil might be 
proved to be a mere lusus nature. : : 
A notable illustration of this is afforded by their regarding 
the veins of fibrous serpentine, or chrysotile, which occur it 
the Canadian specimens, as identical with the tubulated cell 
may 
ey resolve 
themselves into prismatic crystals in immediate po er 
each other ; whereas, under a similar power, the true se f 
is seen to consist of slender, undulating, rounded th Under 
serpentine, penetrating a matrix of carbonate of lime. | uly 
polarized light, more especially, the difference is conspicue 7 
apparent. It is true that, in many specimens and parts 
examined with care under sufficiently high powe 
i nw 
the cell-wall in the specimens from Petite Nation, I com of 
structure with that of these veins, and satisfied myself ¢ 
its distinctness before acceding to his conclusions oD WY 
in 
t 
It would rao appear that the radiating and sheaf-like ie 
73 4 . . Me 
tion of Eozoon ; but these crystals have no Snes 
, en- 
the forms of that fossil, and often occur where these 
