Since we published the figure of Oliva striata, (Oliva, [Pl. 1]. f. 2.) we have procured the true Ancillaria canalifera of Lamark, and find it as we suspected, a very different shell. As Hiatula leads to the Ancillariæ, so does the sub-genus Olivella, (comprising the small operculated Olives) conduct us to the Mitres, by means of Olivella volutella, already figured in this work. We believe the third aberrant form is represented by our Oliva striata, but we shall not proceed to characterize it as a sub-genus, until a better acquaintance with the group is obtained; its analogy to Conohelix, by its external sculpture, seems to us a strong ground of distinction.
We procured all these wide-mouthed Olives from the Messrs. Stuchbury, to whom we are often indebted for the loan of interesting specimens.
Pl. 79.
PIERIS LIMNOBIA.
S. G. Melete.
PIERIS (Melete) Limnobia.
Yellow-underwing White.
Genus Pieris, Lat.