THE DAWN OF LIFE I3I 



has also recently announced the discovery of forms which he 

 regards as akin to the modern Radiolaria, creatures of a little 

 higher grade than the Foraminifera, in the " Archaean " rocks 

 of Brittany.^ Thus Eozoon is no longer isolated, but has 

 companions of the same great age with itself. The progress of 

 discovery is also daily carrying the life of the Cambrian to 

 lower beds, and thus nearer to the Laurentian. It is not un- 

 likely that in a few years a pre-Cambrian fauna will force itself 

 on the attention of the most sceptical geologists. 



References: — "Life's Dawn on Earth," London, 1875, (Now out of 

 print.) "Specimens of Eozoon Canadense in the Peter Redpath 

 Museum, Montreal," 1888. (This memoir contains reference to pre- 

 vious papers.) 



* Natural Science^ Oct., 1892. 



Appended Notes. 



1. StromatoporcB. — It has been usual of late to regard these as allies of 

 the modern Millepores and Hydractineae ; but careful study of large series 

 of specimens has convinced me that some species, notably the Stromato- 

 ceriiim of the Cambro- Silurian and the cryptozoum of the Cambrian, 

 cannot be so referred. I hope to establish this in the future, if time 

 permit. 



2. Modern Foraminifera. — The discovery by Brady and Lister of 

 reproductive chamberlets at the margin of the modern orbitolites, tends to 

 connect this with Eozoon. The gigantic foraminiferal species discovered 

 by Agassiz at the Gallipagos, has points of affinity with Eozoon ; and its 

 arenaceous nature does not affect this, as we know sandy species in this 

 group closely allied to others that are calcareous. 



7* 



