356 On Eozoin Canadense. 
thousand segments, while in Globigerina the continuous increase 
of the individual body by segments soon ceases and new indi- 
viduals are formed by the separation of the segments. 
Reverting to Dr. Dawson’s remark as to the important part 
played by the Eozodn in the Laurentian seas, Dr. Carpenter ob- 
serves the significance of the fact that this lowest t pe of ani- 
mal life known to the physiologist (the Rhizopod) should have 
attained such a great development and apparently culminated in 
os 3 earliest known period in the history of ‘the life of our 
globe. 
The mayne marbles of Tyree and of Skye, whose probable 
form the Eozoén of Canada. The specimen figured by him 1s 
ren ore Warren County, New York. ; 
_ The mode in which the Eozotn has been preserved by the in- 
Jection of serpentine has already been noticed, but is further 
described in Dr. Hunt's paper, from which we make the follow- 
ing extracts: 
«rhe details of structure have been preserved by the intro- 
duction of certain mineral silicates, which have not only filled 
__* See this Journal, [2], xxxix, 97. 
