Biologic evolution

It took a picture of the skin of the husk of the green willow yesterday.
It is a green willow shellfish, a mussel, and a jackknife clam that understood it
is a shellfish from this by three layer two types.
Three shellfishes' characteristics are to cover the husk with the skin.
Because the skin was able to be seen to be discovered with the unassisted eye, it
was comprehensible.

Littleneck clam Cai was observed today.
It is not easy to think that littleneck clam's husk is covered with
the skin.
Because ..crushing.. Cai is like to the green willow shellfish, it is
not easy to say possibility 0.
The shell is divided, and it takes a picture of the shellfish section.

Littleneck clam's section photograph.



Displaying it in the part of a red sign is what appears in the
section of the shell.
I do not have it though there only haves to be a microscope.
The shells seeming are two layers.

Section photograph of Cai. crushing



It was a similar section to the littleneck clam.
Evidence that it crushed and there is a skin in Cai was not found.
There seem to be two Soucats section.


Figure above hunts, and figure Cai below.
It sees it when seeing with the unassisted eye as shown in figure.
It is not understood that two layers have the same meaning as the
skin of the shell.