We find that no vesicle wants its coating of this earthy mineral.
The proper capsule of the Graafian vesicle is composed of two layers.
There is no appearance of vesicle, nor is the skin discoloured.
Near each of their spiracles also is a vesicle which appears to be a reservoir.
This vesicle, of a milky-white colour, and filled with liquid, is the scolex.
Now, this ...