Biologic evolution

The photograph is "Umbonium moniliferum. "
The shape of the shell is Macai.
What layer type of the shell of Macai it was had not been written up
to now.
The shell is like the type. two layers see the photograph




It is a photograph of.
As for the section of the shell of, it is understood that the layer exists, too.
It is ..doubt.. here.
What layer thought whether there was a shellfish in an untouched state to be a
shellfish of the type to be able to do one layer as the layer came in succession, too.


Did it become such an idea why?
It is after the following shellfish's cross section is seen.
It is what picked up from the garbage box.
Shellfish's kind is not actually understood though is a giant clam.
Whether it is a shellfish that was able to capture it in Tokyo Bay or it captures it
in other seas is not understood.



It seems to divide into steps how many when other cracking parts are
seen though sections of the shell seeming are two steps when this
photograph is seen.

The fault seem to be in each ditch of the shell.