Nora,
Here are the ones I have references for:
Scutus breviculus
Calliostoma coppingeri - EA Smith, 1880
Umbonium elegans - Kiener
Neritina waigiensis - Lesson, 1831
Cerithidea montagnei - Orbigny, 1839
Tonna zonata - Green, 1830
Bursa spinosa - Lamarck, 1816
Engoniophos unicinctus - Say
Turbonilla uruguayensis - Pilsbry
By the way, what is Engoniophos unicinctus? I don't seem to have a
reference to it anywhere.
Tom Eichhorst in New Mexico, USA