THE DAWN OF LIFE 



i8' 



state, and possibly capable of living independently 

 and of founding new colonies. 



It is only by a somewhat wild poetical licence that 

 Eozoon has been represented as a " kind of enormous 

 composite animal stretching from the shores of La- 



FlG. 47. — Slice of Limestone [magnified), 



{a) Fragment of Eozoon with canals, {b) Fragments of granular calcite, probal ly 

 organic, (c) Structureless calcite with cleavage lines (Cote St. Pierre). 



brador to Lake Superior, and thence northward and 

 southward to an unknown distance, and forming 

 masses 1,500 feet in depth." We may discuss by- 

 and-by the question of the composite nature of 

 masses of Eozoon, and we see in the corals evidence 

 of the great size to which composite animals of a 



