Sometimes this gland is found in the young and not in the adult (Anodonta, Unio, cyclas).
A genus composed of cyclas amnica, and other similar species.
It is many years since I have looked at a fresh-water shell, but I should have said that the shell was cyclas cornea.
Hosen, shirts, cyclas, and under-jupons are in the brown basket on the left side of the mule.
He wore also a dress which in different times was variously designated as a surcoat, a cyclas, or a tabard.
With patience and a little skill, bivalves as small as cyclas cornea may be treated in this way.
A genus of river shells separated from cyclas principally on account of a difference in the animal.
Its cercari are usually found in an acephalous mollusc, known by the name of cyclas cornea.
We found here Unios of a fine pink and purple colour inside the valves, and a new species of cyclas with longitudinal ribs.
In its hinder part a provisional paired byssus-gland is developed from the epidermis in cyclas and other forms.