Life's Dawn on Earth / Being the history of the oldest known fossil remains, and their relations to geological time and to the development of the animal kingdom

by Sir John William Dawson

(a.) Specimens dissolved out by acid. The lower one showing interior septa. (b.) Specimens seen in section.

Fig. 33. Archæospherinæ from Burgess Eozoon.

Magnified.

Fig. 34. Archæospherinæ from Wentworth Limestone.

Magnified.