Iwo distinct moveable lobes, and the general form and aspect of the animal aré
essentially different from that genus. The true relations of the two forms I
have endeavoured to explain above. Thè author just named has given this
species the appellation of Cìstuda Diardii, which must only be allowed to
swell the list of synonyms, as the present name had been employed to designate
it long before, and is actually quoted as a synonym by Mons. Bibron.
