Our author was evidently puzzled as to the generic position of this peculiar-looking shell, for he has written "Habitu accedit ad Volutas vespertiliones, ore Helicibus, sed labium interius planum, et affinitas cum antecedenti fiat, ut hic relinquatur." The preceding shell alluded to was N. corona.
H. Neritoidea. H. convexa longitudinaliter striata.
The erroneous reference to Gualtieri was not present in the written copy.
H. perspicua. H. convexo-ovata, labio interiore nullo, apertura ad apicem usque pervia.
The then unpublished details of both this and the preceding were referred to in the tenth edition of the 'Systema.' Patens was the proposed specific appellation.
H. haliotoidea. H. depresso-planiuscula obtusissima, ore ovali dilatato.
None of the cited figures were at first accepted by our author, who only added that of Rumphius to the earlier description, and wholly omitted the rest. "Transverse" preceded "striata".
NERITA.
Testa subrotunda, obtusa. Labium interius planum, transversim truncatum, depressum.
The generic arrangement was similar to that of the printed version.