LET'S START OUR STUDY.

General aspect of the ABO

First we cut out the part of the foot on which rests the chemical drill (= Accessory Boring Organ: ABO).

Then we look at its general aspect under low magnification with a SEM.

The ABO is shaped like a smooth mushroom and rests on the surface of the snail foot (by the way, this is not the whole foot, just the part that we cut).