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nydus/A Short History of the WorldPublic
Page 31 of 773
Table of Contents

III THE BEGINNINGS OF LIFE

MARINE LIFE IN THE CAMBRIAN PERIOD
MARINE LIFE IN THE CAMBRIAN PERIOD 1 and 8, Jellyfishes; 2, Hyolithes (swimming snail); 3, Humenocaris; 4, Protospongia; 5, Lampshells (Obolella); 6, Orthoceras; 7, Trilobite (Paradoxides) — see fossil on page 13; 9, Coral (Archæocyathus); 10, Bryograptus; 11, Trilobite (Olenellus); 12, Palesterina

Then, as we come up the record, signs of past life appear and increase. The age of the world’s history in which we find these past traces is called

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