The surface of the egg
was crenelated with the lowest areas oriented along the
length of the egg. It is believed that theses structures
were necessary for the embryonic release of carbon dioxide
gas through pores in the egg. Even though the egg may have
been covered by sediments and vegetation, some mechanism was
needed for the release of toxic gasses. The crenelations and
bumps were believed to have served this purpose by holding
the sediments away from the pores.
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