The LR is from the Gulf of Mexico.
The ceature in the 2nd pic is soft bodied - there is no shell.
Sorry for the poor pic but the shot is going thru 3 pieces of acrylic and falling water as he is behind the overfow box
I am familiar with Chitons as I had one in my nano for over a year.
Here is the Chiton from the Nano
He was always in the rock and only out when all lights were off.
They actually carve the rock
Recently he was on the back wall of the tank which I just knew was not good.
He spent a day going all around the sides of the tank and then he went back into his rock. The next day he was on the substrate. dead.
RIP cool little creature