THE DAWN OF LIFE 



one of the calcite layers. Here was evidence, not only that 

 the calcite layers represented the true skeleton of the fossil, 

 but also of its affinities with the foraminifera, whose tubulated 

 supplemental skeleton, as described and figured by Dr. Car- 

 penter, and represented in specimens in my collection, pre- 

 sented by him, was apparently of the same type with that 

 preserved in the canals of these ancient fossils. Fig. 7 is an 

 accurate representation of the group of canals first detected by 



FIG. 7. Group of Canals in the Supplemental Skeleton of Eozoon. 

 Taken from the specimen in which they were first recognised. Magnified. 

 (Camera tracing by Mr. H. S. Smith.) 



On showing the structures discovered to Sir William Logan, 

 he entered into the matter with enthusiasm, and had a great 

 number of slices, as well as decalcified specimens, prepared, 

 which were placed in my hands for examination. 



Feeling that the discovery was most important, but that it 

 would be met with determined scepticism by a great many 

 geologists, I was not content with examining the typical speci- 

 mens of Eozoon, but had slices prepared of every variety of 



