Tom,
In addition to the papers, that Rich mentioned. I found a reference for
one of the species and some possible leads for others:
Neopetraeus camachoi Weyrauch, 1967
Acta zoologica Lilloana Vol. 21.
You may find some of the other species in that document or possibly in:
Weyrauch, 1956. The Nautilus 69(4).
Weyrauch, 1957. Archiv für Molluskenkunde 86(1/3).
Weyrauch, 1960. Archiv für Molluskenkunde 89(1/3).
Weyrauch & Zilch in Zilch, 1954. Archiv für Molluskenkunde 83(1/3).
Bret
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