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FIRST SET OF PICTURES:

Top:
1,2 – Attiliosa nodulifera (Western Pacific, usually Philippines)
3 – Spinidrupa spinosa (Indo-Pacific)
4 – Nucella emarginata (Western North America)

Bottom:
1,2 – appear to be Murexiella lappa (West Central America)
3 – probably Peristernia philberti (Western Pacific)
4 – Cantharus wagneri (Western Pacific)

SECOND SET OF PICTURES:

Top:
1-4 – These all appear to be Muricopsis bombayanus (usually from India)

Bottom:
1 – Otopleura auriscati (Western Pacific) (family Pyramidellidae)
2 – Peristernia ustulata (Southwest Pacific)
3,4 – Mitra lugubris (Western Pacific, usually Philippines)

THIRD SET OF PICTURES:

Top:
1 - Calliostoma sp., probably Calliostoma tranquebarica (usually from India)
2 – appears to be Calliostoma palmeri (West Central America)
3 – Calliostoma sp., species uncertain, could be Calliostoma jujubinum, but not certain.

Bottom:
1 – Calliostoma annulatum (Western North America)
2 -  This is a Liotia or Liotina, probably Liotina peronii (Australia)

FOURTH SET OF PICTURES:

Top:
1,2 – Littorina (Littoraria) filosa (Australia)
3 – Obba rota (Philippines) (a land snail)

Bottom:
1 – Marginella angustata (Indian Ocean)
2 – Astralium calcar (juvenile) (Western Pacific, usually Philippines)